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Pacific Ridge Reports Drill Results, Mariposa Property, Yukon’s White Gold District

VANCOUVER, BRITISH COLUMBIA — November 29, 2011 — Pacific Ridge Exploration Ltd. (TSXV: PEX) (the “Company”) reports that all assay results have now been received from the first diamond drill program on its Mariposa Gold Project, in the Yukon’s White Gold District. The 2011 drill program was successful in making a new gold discovery in the White Gold District.

On the Mariposa property, gold was intersected in a total of 20 drill holes: 18 in the Skookum Main and Skookum West areas, and 2 in the Maisy May area. Broad areas of intensely fractured and hydrothermally altered rock, which appear related to deposition of the gold, were noted in both drill core and surface float samples. The results warrant additional drilling and trenching in 2012 to further define geometry and extent of gold bearing structures encountered and to follow-up on additional targets emerging from 2011 soil sampling. Complete results from approximately 9,000 soil samples collected on the Mariposa and Eureka Dome properties remain pending and will be reported when available.

Also of importance is the identification of a 15 kilometre-long brittle deformation zone, referred to as the Mariposa Fault, within which the presence of gold in bedrock has been confirmed from this year’s diamond drilling. In prolific gold mining camps, such corridors have the potential to host significant gold deposits. Within the Mariposa Fault, which remains largely unexplored, additional targets have emerged from geophysical and geochemical coverage completed to date. A comprehensive exploration program, to include diamond drilling, is therefore planned in 2012 to continue to systematically evaluate this prospective corridor.

HIGHLIGHTS

Skookum Main
• 14 of 18 drill holes intersected gold mineralization within steeply dipping, brittle structures hosted by strongly sericite and quartz K-feldspar altered rock.

• Gold bearing structures within a broad area of altered rock are coincident with linear magnetic lows and elevated gold-in-soil results, which recently returned values up to 1.95 g/t. (grams per tonne).

• Visible gold was noted both in near surface intersections (hole 11MP-01) and at depth (hole 11MP-27), with elevated gold results associated with increased pyrite mineralization, as well as quartz and K-feldspar breccias.

• Drill results indicate gold potential to depth and along strike. Preliminary soil results show gold anomalism to the east and north, where silt samples returned up to 323 ppb gold.

Drill results include the following selected intercepts:

Skookum West
• Soil sampling results identified an open-ended 1.5 kilometre-long trend defined by greater than 50 ppb gold, to a peak result of 514 ppb. Additional soil results are pending.

• Detailed prospecting located gold in float samples, grading up to 19.9 g/t gold.

• Widely spaced drilling intersected narrow gold intercepts in 4 of 14 holes. Strong alteration similar to that at Skookum Main was encountered in drill holes 11MP-10, -11, -32, -33, and -41.

Drill results include the following intercepts:

EXPLORATION REPORT

The 2011 drill program was conducted in the western part of the property where gold-in-soil anomalies were detected in the Mariposa grid area. Five exploration targets were tested with 41 holes comprising 6,000 metres of drilling. The program was carried out within the following target areas: Skookum Main-18 holes (3,005 metres), Skookum West-14 holes (1,671 metres), Maisy May-4 holes (754 metres), Gertie-3 holes (282 metres), and Hackly Gold-2 holes (299 metres). The results for each area are further discussed below, with drill hole assay composites included in the table appended to this report.

The combined results of geophysical and geochemical surveys have identified broad areas of gold anomalism within the Mariposa Fault. This corridor, which contains Skookum Main and Skookum West, is defined by a series of parallel and converging magnetic and topographic breaks interpreted as brittle fault structures. It spans a length of 15 kilometres within the property from the Mariposa grid in the west toward the headwaters of Alberta Creek in the east. The interpreted structures defining the Mariposa Fault cut the prolific placer gold deposits mined in both Scroggie and Mariposa Creeks, suggesting that gold mineralization within these bedrock structures may have contributed to the gold endowment of the placer deposits in the area.

Within the Mariposa Fault, results have identified anomalous gold values in both grid soil and rock sampling along the Skookum Jim trend, which includes Skookum Main and Skookum West, as well as from recent soil sampling in the Alberta Creek area.

Skookum Main
The 2011 exploration program included diamond drilling, airborne and ground geophysical surveys, infill soil sampling within previously defined gold-in-soil anomalies, as well as soil sampling to further define open-ended extensions of the gold-in-soil anomaly. Drilling tested an approximate 600 x 250 metre area of the 3.5 kilometre-long Skookum Jim gold-in-soil trend. A total of 3,005 metres were drilled in 18 holes.

Drill holes targeted 2010 trenching intercepts and combinations of gold-in-soil anomalies and geophysical targets interpreted to represent geological structures. The results of 10 drill holes were previously reported; the results of the remaining 8 drill holes are reported herein. 14 of the 18 holes drilled in this area were successful in identifying a broad gold bearing system closely coincident with a magnetic low response and strong gold-in-soil anomalism.

The first drill hole, 11MP-01, intersected results of 2.44 g/t gold over a drilled interval of 38.9 metres, containing a section of 6.44 g/t gold over 11.1 metres. This hole was drilled under an interval in trench SJ-2, which had returned 1.25 g/t gold over 30 metres. Drill holes 11MP-05 and 11MP-06 also targeted anomalous gold values in trenches, and returned broad sections grading 1.13 g/t gold over 19.8 metres (11MP-05) and 0.63 g/t gold over 45.3 metres (11MP-06). Drill holes cutting deeper in the area of this section (11MP-01, -08, and -27), beyond the extent of oxidation, intersected significant gold results associated with quartz K-feldspar breccias and pyrite, with individual samples up to 9.24 g/t gold.

Drill holes 11MP-01, -02, -05, and -06 intersected gold-bearing intervals hosted within a 75 metre wide (drilled section), steeply dipping corridor of strongly limonitic fractures overprinting quartz veining and breccias, as was encountered in trench SJ-2. This brittle deformation cuts a diffuse contact zone between granodiorite and quartz-biotite gneiss, which have both been hydrothermally altered and cut by local pegmatite and quartz-feldspar pyritic veinlets. Late andesite dykes overprinted by strong faulting and fracturing were intersected in the westernmost drill holes 11MP-22, -23, and -24. Drill hole 11MP-24 encountered mineralization from surface, grading 1.09 g/t gold over 4.5 metres, suggesting that stronger mineralization may be located to the east where there are soil values of up to 620 ppb gold.

Sulphide content varies within the Skookum Main drill holes. Pyrite occurs either as boxworks within limonitic fracture fillings or as grains within quartz veins or silicified sections. Elevated pyrite of 3-5% was noted within intense quartz feldspar breccias encountered in the gold intercept at depth in hole 11MP-27. This style of mineralization was observed at surface in trench SJ-2, and correlates with elevated gold values.

The geometry of observed structures from both drill core and detailed geophysics suggests that a series of steeply dipping, northerly trending (NNW and/or NNE) structures may be important loci for gold mineralization within the northeasterly trend defined by magnetic responses. The predominantly north-south oriented drill pattern of the 2011 program, while successful in encountering significant gold, may have only tested a limited area of these prospective trends. A compilation of exploration results currently in progress should further define the geometry of the gold bearing structures in preparation for drilling in 2012.

Skookum West
Within the 1.5 kilometre-long Skookum West area, a total of 1,672 metres were drilled in 14 holes. The targets included a combination of geophysically defined lineaments, elevated gold-in-soil results, and numerous rock sample results (angular float) ranging in grade from 0.5 to 19.9 g/t gold. Targets were tested by either single holes or the fanning of up to 3 holes from one set-up in order to obtain additional geological information.

Drilling tested an east-northeast trending magnetic low anomaly with 6 widely spaced holes over a 700 metre distance (11MP-10, -11, -31, -32, -33, and -41). Eight holes (11MP-12, and 11MP-34 through 11MP 40), drilled from 4 additional sites, tested geophysical and topographic lineaments and gold values in float sample locations.

The targets drilled in the Skookum West area returned narrow intercepts in holes 11MP-10, -12, -32, -33, and -34. The best results to date, from 11MP-10 and 11MP-33, returned 1.19 g/t gold over 4.1 metres and 3.74 g/t gold over 1.2 metres, respectively. The intensity of alteration, fracturing, and veining is widely variable from strong, in drill holes 11MP-31, -32, and -41, to no alteration in drill holes 11MP-35, -36, -39, and -40. The latter drill holes were not sampled, as the rock encountered appeared barren and unfavorable for hosting gold mineralization.

The drilling results obtained in the Skookum West area have as yet to explain the significance of widespread gold anomalism contained in rocks and soils collected to date. In preparation for on-going drilling proposed in 2012, a program of trenching will be carried out in areas of gold-bearing float in order to expose bedrock sources for sampling and the definition of geological parameters to aid selection of drill hole locations.

Maisy May
In the Maisy May area, a total of 774 metres were drilled in 4 holes. The primary drill target was a multi-element gold, bismuth, copper, arsenic, and mercury soil anomaly coincident with potential NS and NE trending structures defined from airborne magnetic lineaments. Previous prospecting located a 400 metre-long, northwest trending train of siliceous float material. Selected samples of the float returned anomalous results of up to 1.08 g/t gold, with anomalous silver, copper, bismuth, antimony, and tellurium values.

Drill holes 11MP-13 and -14 did not intersect significant gold values. At depth, drill hole 11MP-16 intersected a section of silicified quartz sericite schist with 3-5% pyrite and chalcopyrite containing 0.72 g/t gold over 5.8 metres. This interval appeared similar to the mineralized float boulders sampled on surface.

Drill hole 11MP-15 was located further downslope to the northeast and tested anomalous gold-in-soil results coincident with a linear magnetic low. Anomalous gold results of 0.54 g/t gold over 6.5 metres and 2.13 g/t gold over 2.5 metres were associated with sections of fractured and brecciated quartz veins, similar to those encountered at Skookum Main.

Given the strong geochemical anomalism of both rock and soil samples from this area, additional field reviews are warranted to determine the source of mineralization that has been detected in both float and drill core.

Gertie
In the Gertie area, a total of 282 metres were drilled in 3 holes. Rock sampling of float in this area returned anomalous copper, arsenic, stibnite, and mercury values. Holes 11MP-17 and -18 encountered poor ground conditions due to strong faulting, and were abandoned before reaching the target depth. Drill hole 11MP-19 did not return significant results.

Hackly Gold
In the Hackly Gold area, a total of 299 metres were drilled in 2 holes. Holes 11MP-20 and -21 were planned to test anomalous 2010 gold-in-soil results. No significant drill results were returned, however, further prospecting in this area is warranted, as contour soil results from 2011 geochemical sampling continue to yield anomalous gold results.

PLANS FOR 2012

With the success resulting from work completed on the Mariposa property to date, the Company is planning a comprehensive exploration program in 2012. Additional results from this year’s program remain to be compiled, however, an integrated program of continued geochemical and geophysical surveying is recommended to prioritize areas for detailed follow-up. Existing targets can be further refined with detailed ground surveys, geological mapping, prospecting, and trenching. Based on exploration results to date, diamond drilling will further explore the extent and geometry of gold bearing structures in the Skookum Main zone.

Within the Skookum West area continued surface exploration will be carried out to further delineate drill targets. With complete results pending for the Alberta Creek area, it is anticipated that continuing surface exploration may identify potential drill targets.

Elsewhere in the White Gold District, a compilation of existing and pending results from the Goldcap, Polar Stewart, and Eureka Dome properties will determine plans for ongoing exploration in 2012.

Sampling methods, analytical procedures, and QA/QC protocols are as reported in the news release dated July 28th, 2011.

The technical information contained within this News Release has been reviewed and approved by Janice Fingler, P.Geo, Vice President Exploration of Pacific Ridge Exploration, and Qualified Person as defined by National Instrument 43-101 policy.

On behalf of the Board of Directors,

John S. Brock

President and CEO
Pacific Ridge Exploration Ltd.

For further information, contact:

Corporate Information
Pacific Ridge Exploration Ltd.
John S. Brock
President and CEO
Tel: (604) 687-4951
www.pacificridgeexploration.com

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PACIFIC RIDGE REPORTS GOLD INTERSECTED IN 9 OF 10 INITIAL HOLES DRILLED AT SKOOKUM MAIN TARGET, MARIPOSA PROJECT, YUKON

Pacific Ridge Exploration Ltd. has successfully completed its 2011 exploration program on its properties in the Yukon’s White Gold district. The 2011 exploration activity was focused on the Mariposa property, which included 6,000 metres of diamond drilling in 41 holes, grid-based soil sampling, ground and airborne geophysics, and geological reconnaissance work. The results of 10 of the 18 Phase 1 holes drilled in the Skookum Main target are included in this release. As shown in the summary table below, gold values were intersected in 9 of these 10 holes. The results received to date warrant continued drilling in 2012.

The Company also explored its other holdings in the district during the 2011 season. On the Eureka Dome Property, geochemical and airborne geophysical surveys were carried out, and geological reconnaissance was conducted on the Gold Cap Property.

Mariposa

This year’s 6,000 metre drilling program was designed as a widely-spaced preliminary drill test of 5 exploration targets defined by combinations of gold-in-soil anomalies, magnetic and electromagnetic geophysical signatures, float samples with anomalous gold content, and trenching results. The drill program was executed in 2 phases, with Phase 1 drilling testing targets at the Skookum Main (9 holes), Skookum West (3 holes), Maisy May (4 holes), Gertie (3 holes) and Hackly Gold (2 holes), followed by an additional 9 drill holes at Skookum Main. Phase 2 drill holes tested additional targets at Skookum West (10 holes), which were generated from this year’s soil and rock sample results.

Skookum Main

At Skookum Main, a total of 18 holes were drilled (3,005 metres) within an open-ended, northeast-trending 800 metre by 500 metre corridor. Skookum Main contains anomalous gold-in-soil results ranging to over 1,500 parts-per-billion (ppb), float samples grading to 8.1 grams per tonne (g/t) gold, and trench assays grading to 1.3 g/t gold over 30 metres. This widespread gold anomalism coincides with converging NE and NNE trending structures as interpreted from the airborne geophysical survey.

Assays received to date for the 10 of 18 holes drilled are reported below. In summary, 9 of these 10 holes reported gold intersections of which 8 contained multiple gold bearing intervals. Hole 11MP-01, for which an upper intercept of 2.44 g/t gold over 38.9 metres was previously reported, also intersected 2.59 g/t gold over 9.6 metres, including 6.51 g/t gold over 3.2 metres at depth. The previously reported results indicated gold within both surface trenches and upper, oxidized sections of rock drilled. The deeper intercepts reported below, for drill holes 11MP-01 and 11MP-08, have confirmed that gold also occurs within unoxidized sections at depth. Anomalous gold values are typically associated with potassium feldspar flooding and veinlets, as well as quartz breccias and pyrite as disseminations and/or stringers. Grade potential to depth is demonstrated by individual assays ranging to 9.24 g/t gold. Elevated gold values are commonly associated with increased pyrite content.

Drill hole 11MP-27 tested the Skookum Main anomaly to its greatest vertical depth (180m) and encountered similar mineralization. Core samples sent for rush assay service from this hole confirmed the association of gold with this style of mineralization, with an intercept of 1.03 g/t gold over 14.7 metres.

 

       2011 SKOOKUM MAIN - Drilling Results (10 of 18 Holes Reported)      
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                                                           Weighted    Prev-
                                                    Inter-    Grade  iously
Drill    Length     Azi-            From      To      val      (g/t   Repor-
Hole         (m)   muth      Dip      (m)     (m)      (m)     gold)    ted
---------------------------------------------------------------------------
11MP-01     237     180      -50    29.1    68.0     39.0      2.44      (i)
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                                    82.7    95.5     12.8      1.66        
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                                   204.0   213.6      9.6      2.59        
---------------------------------------------------------------------------
                        includes   210.4   213.6      3.2      6.51        
---------------------------------------------------------------------------
                                                    no significant         
11MP-02     167     180      -67     3.1   167.4       results             
---------------------------------------------------------------------------
11MP-03     170     180      -50   102.9   106.4      3.5      0.56        
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11MP-04     178     360      -50     4.0     8.9      4.9      1.50        
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                                    89.2    91.3      2.1      0.79        
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                                   108.8   110.2      1.4      1.03        
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11MP-05     192     180      -50     3.1    22.9     19.8      1.13      (i)
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                                    19.9    22.9      3.0      2.79      (i)
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                                    49.5    50.4      0.9      3.01        
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11MP-06     148     180      -65     3.7    49.2     45.3      0.63      (i)
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                        includes     5.6    13.9      8.3      1.01      (i)
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                                    22.3    25.8      3.5      1.55      (i)
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11MP-07     182     180      -45   130.3   133.2      2.9      1.62        
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                                   132.5   133.2      0.8      4.24        
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11MP-08     231     360      -45   186.9   198.9     12.0      1.67        
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                        includes   198.1   198.9      0.8      7.97        
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                                   213.5   222.7      9.2      1.40        
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                        includes   214.6   216.8      2.2      3.25        
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11MP-09     167     270      -45    17.7    22.5      4.8      1.01        
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                                    43.5    45.0      1.5      2.71        
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                                    73.0    74.1      1.1      1.88        
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                                    85.0    86.5      1.5      1.60        
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11MP-27     197     360      -50    22.2    25.5      3.3      0.86        
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                                    77.6    81.3      3.7      0.88        
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                                   124.0   138.7     14.7      1.03        
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                        includes   134.0   138.7      4.7      1.96        
---------------------------------------------------------------------------
Sampling methods, analytical procedures and QA/QC protocols are as reported
in news release, July 28th, 2011

 

At Skookum Main, the drilling results to date have confirmed the presence of gold within the original Skookum Jim soil anomaly, both over a broad area and to depth. The complete drill results will be compiled to further assess the controls on the distribution of gold mineralization. The results to date warrant continued drilling in 2012 to test continuity and extent of gold zones intersected in this year’s program.

Skookum West

At Skookum West, 14 holes (1,672 metres) were drilled within an area of anomalous gold-in-soil results, float samples ranging in grade to 19.9 g/t gold and geophysical signatures suggesting the presence of favourable geologic structures. The results of drilling in this area will be reported when all assays are received.

Maisy May, Gertie and Hackly Gold

At Maisy May, 4 holes were drilled (774 metres) to test a broad multi-element soil geochemical anomaly with elevated gold, silver, antimony, and mercury values. The drill results identified minor, narrow sections with anomalous (greater than 100 ppb) gold, to a high of 2.2 g/t gold for an individual sample in hole 11MP-16. The holes intersected a section of variably oxidized, quartz-sericite-chlorite +/-pyrite schist, which may be an older, pre-existing alteration zone unrelated to the soil anomaly. The source of the soil anomaly has not yet been determined.

No significant results were returned from 3 holes (774 metres) drilled at Gertie, and 2 holes (300 metres) drilled at Hackly Gold. The first 2 holes, 11MP-17 and -18, in the Gertie area were abandoned due to poor ground conditions and failed to reach the target depth. On-going exploration in 2012 in these areas will require more detailed field evaluations and trenching prior to additional drilling.

Eureka Dome

A program of soil sampling along topographic ridges, spurs and contours was completed over the entire property. Also, an airborne magnetic/radiometric survey was conducted over the southern part of the claim block. The results from these surveys are. The property is located 40 kilometres north of Mariposa and is flanked by claims held by Smash Minerals to the southwest, Golden Predator to the west and Taku Gold to the east and north. Smash Minerals has been actively exploring the area south of the property boundary with trenching and drilling.

Gold Cap

A preliminary site visit was conducted to assess selected gold-in-soil trends that were defined from 2009-2010 sampling. The results of this work is pending. The property lies on the northeastern flank of Kinross’s White Gold project. It is comprised of the Gold Cap claim group, which is 100% held by the Company and the Polar Stewart claim group, which is held under option to earn 100% from Ryanwood.

Pacific Ridge currently has approximately $2.4 million in its treasury.

The technical information contained within this News Release has been reviewed and approved by Janice Fingler, P.Geo, Vice President Exploration of Pacific Ridge Exploration, and Qualified Person as defined by National Instrument 43-101 policy.

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PACIFIC RIDGE PROVIDES EXPLORATION UPDATE FROM THE MARIPOSA GOLD PROPERTY

Pacific Ridge Exploration Ltd., during exploration at the Mariposa property, located within the Yukon’s White Gold district, has completed 34 drill holes for a total of 5,350 metres drilled so far this season. Receipt of assay results has seen delays due to high volume and continuous sample submittals as a result of increased exploration activity in the Yukon.

The objective of the 2011 drilling program is planned around completion of approximately 6,000 metres of diamond core drilling to test five gold exploration targets located within an approximate 26-square-kilometre area of the overall 262-square-kilometre Mariposa property.

The following exploration targets currently defined within the Mariposa property have seen preliminary drilling: Skookum Main — 18 holes, Skookum West — seven holes, Hackly — two holes, Gertie — three holes and Maisy-May — four holes. The Big Alex target will be drill tested next season.

Drilling is currently focused on the Skookum West area of the 3.5-kilometre-long Skookum Jim gold-in-soil trend where recent surface exploration has generated new drill targets over a two-square-kilometre area. This area lies approximately 1.5 kilometres to the southwest of the Skookum Main area, where this year’s drilling has reported results of up to 2.44 grams per tonne gold over 38.9 metres.

The Skookum Jim trend is centred along an east-northeast-trending plateau which coincides with a structural corridor that is clearly defined by disruptions and offsets of linear airborne magnetic features. The Skookum Main area lies to the north of the most prominent of these structural breaks, whereas the Skookum West straddles this break at a location where an array of northwest-, northeast- and north-south-trending structures appear to be crosscutting the main east-northeast-trending structure. Elsewhere in the White Gold district, similar structural settings are of key importance for the hosting of gold mineralization. It is also notable that north-trending structures in the Skookum West area are parallel to the prolific placer gold drainage of Scroggie Creek that flows to the north, through the western part of the Mariposa property.

In 2010, widely spaced soil sampling along 100-metre lines at Skookum West first detected gold-in-soil anomalism of up to 512 parts per billion gold, with locally elevated molybdenum values. During 2011, infill soil sampling at 25-metre stations further defined strong gold anomalism over a minimum 1,500-metre-by-800-metre area. Gold-in-soil results ranging from 20 parts per billion to a peak of 514 parts per billion appear to coincide with linear magnetic lows and/or flank magnetic highs. These features, interpreted as reflecting brittle structures and underlying mafic rock types, provide a geologic setting with potential to host gold mineralization.

Detailed prospecting and rock sampling of surface float has returned significant results within the Skookum West gold-in-soil anomaly. Of a total of 117 rock samples from a two-square-kilometre area, 27 returned results greater than 0.5 g/t gold, to a high of 19.98 g/t gold. The average grade of these results is 3.3 g/t gold. Again, as seen elsewhere in the White Gold camp, these elevated gold assays are hosted in well-silicified rocks cut by limonitic fracture nets and hematite-specularite alteration along with minor disseminated pyrite.

Some of the anomalous gold results were obtained from rock samples in areas with no indicated gold-in-soil response, but along structures interpreted from magnetic surveys. This suggests that the prospectivity of the Skookum West area may cover a larger area than indicated by the soil geochemical results. Continuing diamond drilling is therefore testing a combination of targets in the Skookum West area that include structural trends and soil and rock geochemical signatures.

It is contemplated that the drilling season will come to a close in mid-September with approximately 40 holes completed.

The technical information contained within this news release has been reviewed and approved by Janice Fingler, PGeo, vice-president, exploration, of Pacific Ridge Exploration, a qualified person as defined by National Instrument 43-101.

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Pacific Ridge Drills New Yukon Gold Discovery: First Hole Intersects 2.44 Grams Per Tonne Gold Over 38.9 Metres at Mariposa in White Gold District

Vancouver, B.C. – July 28, 2011 – Pacific Ridge Exploration Ltd. (TSX Venture: PEX) (the “Company”) reports that its first diamond drill hole has intersected 2.44 grams/tonne (g/t) gold over a 38.9 metre interval that includes 6.44 g/t gold over an 11.1 metre interval at its Mariposa Property in the Yukon’s White Gold District.
The initial objective of the Phase 1 drilling program is to test five gold-in-soil anomalies coincident with geophysical signatures indicating geological structures prospective for hosting gold mineralization. These exploration targets are contained within an approximate 21 square kilometre area within the overall 262 square kilometre Mariposa Property.

Currently, approximately 3300 metres have been drilled in 21 holes which have tested the Skookum Jim (12 holes), Maisy May (4 holes), Gertie (3 holes) and Hackly (2 holes) targets. Holes have been drilled to lengths ranging between 76 and 238 metres. Based on early exploration results, the Company has increased its initial 4,000 metre drilling program to 6,000 metres. This expanded program will continue to focus on untested gold anomalies within the Skookum Jim target.

Within the open-ended 3.5 kilometre-long Skookum Jim target, a total of 12 drill holes have been completed to date. The initial 9 drill holes of the program have tested a 500 metre long corridor of an area now referred to as ‘Skookum Main’. In 2010, gold-in-soil and trench results first detected gold anomalism along this part of the larger Skookum Jim trend. Approximately 1.5 kilometres to the west along this trend, another 3 widely spaced holes have been drilled in an area now referred to as ‘Skookum West’.

The following assay results have been received from partial intervals within 3 of 9 drill holes completed in the Skookum Main area. The lengths indicated are drilled intervals and do not necessarily represent true widths of mineralized sections. Additional drilling is warranted to assess the geometry of the intercepted structures.

Drill
hole
Azimuth Dip From
(m)
To
(m)
Interval
(m)
Weighted grade
(g/t gold)
11MP-01 180 -50 29.1 68.0 38.9 2.44
Contains     29.1 40.2 11.1 6.44
Including     32.9 35.0 2.1 26.58

Hole 11MP-01 was drilled under an interval in trench SJ-2 which returned 1.25 g/t gold over 30 metres. Additional results are pending for core samples from downhole lengths of 68 metres to end-of-hole at 237 metres.

Drill
hole
Azimuth Dip From
(m)
To
(m)
Interval
(m)
Weighted grade
(g/t gold)
11MP-05 180 -50 3.1 22.9 19.8 1.13
Including     19.9 22.9 3.0 2.79
and     22.9 70.5 no significant assays

Hole 11MP-05 was located 80 metres south of Hole 11MP-01 and was drilled under another interval in trench SJ-2 which returned 1.17 g/t gold over 10 metres. Additional results are pending for core samples from downhole lengths 70.5 metres to end-of-hole at 192 metres.

Drill hole Azimuth Dip From
(m)
To
(m)
Interval
(m)
Weighted grade
(g/t gold)
11MP-06 180 -65 3.7 49.0 45.3 0.63
Includes     5.6 13.9 8.3 1.01
and     22.3 25.8 3.5 1.55

Drill hole 11MP-06 was drilled from the same location as 11MP-05 to undercut Hole 5. Additional results are pending from core samples from downhole depths of 61.6 metres to end-of-hole at 148 metres.

The geological setting for anomalous gold intercepts in the above reported drill holes (11MP-01, 05, and 06) appears to be within a 75 metre wide (drilled section), steeply dipping corridor of strongly limonitic fractures and breccias with local quartz veining. This brittle deformation cuts a diffuse contact zone between granodiorite and quartz-biotite gneiss, which have both been variably altered and cut by local pegmatite and quartz-feldspar +/- pyrite veinlets. The extent of this geologically favorable corridor is yet to be defined by both surface work and diamond drilling.

In summary, the Company is encouraged by drilling results received to date, that being based on partial analytical results from only 3 of 21 holes drilled. These results confirm the gold potential of the Mariposa Property. On-going results will be reported as received as the Mariposa drilling program continues.

Sampling methods and analytical procedures

Drill core is cut or split in half, with one half of each sample forwarded for analysis, and the remaining half archived on site. As part of the quality assurance-quality control (“QAQC”) program, a series of certified reference standard material, blank material and core duplicate samples are inserted into each batch. Samples are sent directly by air charter to the preparation facility of Inspectorate Exploration & Mining Services in Whitehorse, YT (“Inspectorate”), where they are crushed and pulverized to 85% passing 200 mesh. Coarse reject material from each sample remain stored with Inspectorate in Whitehorse, while the pulps were couriered to Inspectorate’s laboratory in Richmond, BC, Canada, which is ISO 9001:2008 certified.

Determinations for gold were completed on a 30g subsample subjected to fire assay, followed by an atomic absorption (“AA”) finish. Results are reported as ppb (parts per billion). Sample results exceeding 10,000 ppb gold are subjected to fire assay followed by a gravimetric finish. Results are reported as grams per tonne gold. An additional 30 elements were determined by sample digestion in an aqua regia solution and analysis by ICP-MS and ICP-ES. Mercury determinations were completed by cold vapour fusion.

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PACIFIC RIDGE DRILLING AT MARIPOSA STARTS IN WHITE GOLD DISTRICT

Pacific Ridge Exploration Ltd.’s diamond drilling is now under way on the Pacific Ridge Mariposa gold property located in the Yukon’s White gold district. This 4,000-metre diamond drilling program comprises a significant part of Pacific Ridge’s $3-million phase 1 exploration budget. There is no history of previous drilling at Mariposa.

Diamond drilling will test the Skookum Jim and Hackly zones, two of five gold-in-soils geochemical anomalies defined in 2010 within the 262-square-kilometre Mariposa property. It is currently estimated that the initial drill program will comprise 20 to 25 drill holes.

Initial drilling will be directed to the 3,500-metre-by-600-metre Skookum Jim target containing gold-in-soil anomalies ranging from 100 to 1,570 parts per billion (ppb) gold that are coincident with magnetic and electromagnetic geophysical anomalies interpreted to represent underlying structures. The Skookum Jim target is in a favourable geological setting that hosts coincident geochemical and geophysical signatures that are also associated with gold mineralization recently discovered elsewhere within the White gold district. Trenching conducted by Pacific Ridge in 2010 within the anomaly further confirmed the presence of gold with composite rock sample results of up to 1.25 grams per tonne (g/t) gold over 30 metres of strongly fractured, brecciated and oxidized rock. A strongly oxidized hematitic rock sample in the trenching area also returned 8.1 g/t gold.

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MARIPOSA PROPERTY EXPANDED TO OVER 1,400 CLAIMS AND PACIFIC RIDGE EXPLORATION TO ATTEND THE VANCOUVER WORLD RESOURCE INVESTMENT CONFERENCE

Pacific Ridge Exploration Ltd., by way of recent claim staking plus option of an adjacent property, has expanded its Mariposa property holdings by 44 per cent, to over 1,400 claims that now cover 262 contiguous square kilometres within the Yukon’s white gold district.
The recently completed staking of 387 mineral claims has extended the northwestern and southeastern boundaries of the Mariposa property.

These claims were staked to cover airborne magnetic features which have been interpreted to represent geologic structures with potential to host gold mineralization. The northwestern claim block lies to the north of the plateau of the Skookum Jim gold-in-soil anomaly, while the southeastern block covers an area drained by creeks with anomalous gold-in-silt results of 12 and 34 ppb gold, obtained from government geochemical surveys.

In the northwestern area of the property, Pacific Ridge also has an option to acquire an additional 39 claims by way of a letter of understanding with a private vendor. To exercise the option and earn a 100% interest in the property, Pacific Ridge will issue 200,000 common shares and pay $85,000 in staged payments over the ensuing three-year period. The property will be subject to a 2% net smelter return royalty (NSR) that allows Pacific Ridge the exclusive right to buy 50% of the NSR (1%) for $1,000,000 upon receiving a production notice in respect of the property. The letter of understanding is subject to acceptance for filing on behalf of Pacific Ridge by the TSX Venture Exchange.

On June 5th and 6th, Pacific Ridge Exploration will be represented at the Cambridge House Vancouver World Resource Investment Conference, booth number 1012. Management will be in attendance and pleased to update shareholders and all interested parties. In addition, John Brock, President and CEO will provide a corporate presentation on Sunday, June 5th at 12:00 pm in Workshop Room 1.

Janice Fingler, P. Geo., Vice-President Exploration for Pacific Ridge Exploration Ltd. is the Qualified Person, as defined by NI 43-101, for the property and has reviewed the technical information in this release.

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PACIFIC RIDGE MARIPOSA PROGRAM STARTS IN WHITE GOLD DISTRICT

Pacific Ridge Exploration Ltd. has commenced exploration activities for 2011 on the Pacific Ridge Mariposa gold property in the Yukon’s White Gold district. A Phase 1 program, budgeted at $3 million, will include 4,000 metres of diamond drilling to test several significant gold-in-soil anomalies and gold values in trenches identified in 2010. Field crews have mobilized to the site and diamond drilling will commence in mid-June.

During the month of April a detailed airborne magnetometer survey was flown over the 2010 Mariposa soil grid area, to identify geologic structures with potential to host lode gold mineralization. A preliminary interpretation of results suggests that the Mariposa grid area lies within a major, 3 kilometre wide structural corridor of converging arrays of more discrete northeast, northwest and north-south trending structures.

The 3500 metre long x 600 metre wide Skookum Jim gold-in-soil anomaly is to date, the most prominent gold trend on the Mariposa property. A compilation of airborne magnetic, soil and trenching results indicate that in the trenched area of this geochemical anomaly, there is a strong spatial correlation of converging linear magnetic lows with elevated soil results ranging from 100 to 1,570 ppb gold. These geophysical and geochemical trends correspond with trench exposures of strongly fractured, brecciated and oxidized rock which returned results of up to 1.25 g/t gold over 30 metres. A strongly oxidized hematitic rock sample in the trenching area also returned 8.1 g/t gold.

In light of these encouraging results, the company has scheduled a detailed ground magnetic and electromagnetic survey in advance of diamond drilling. This geophysical survey will be conducted over priority areas of geochemical anomalism on the Mariposa grid, including the Skookum Jim, Hackly Gold and Maisy May targets, as well as selected airborne geophysical trends. Simultaneous with the geophysics,in-fill soil samples will be collected in these areas and analyzed on-site with an XRF analyzer, in advance of analysis with a commercial laboratory. This instrument can provide daily qualitative results which may detect pathfinder elements highlighting areas of interest for immediate follow-up.

In summary, the 2011 exploration program is designed to quickly evaluate and drill test exploration targets defined last season within the Mariposa soil grid area, as well as to continue exploration of the overall 190 square kilometer property through reconnaissance soil sampling that should lead to grid controlled sampling of newly defined areas of prospectivity.

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PACIFIC RIDGE COMPLETES AIRBORNE MAGNETIC SURVEY AT MARIPOSA

An airborne magnetometer survey has been completed over a portion of Pacific Ridge Exploration Ltd.’s Mariposa gold property in the Yukon’s White gold district. The survey covered the area of six gold-in-soil targets detected during the 2010 exploration program, including the 3,500-metre-long by 600 m wide Skookum Jim gold anomaly.

The high-resolution aeromagnetic survey was conducted by Precision GeoSurveys Inc. of Vancouver, B.C., using a helicopter-mounted cesium vapour magnetometer. A total of 900 line kilometres were flown along 100-metre-spaced lines and 1,000-metre-spaced tie lines. Results are currently being processed and will be subsequently interpreted together with geochemical datasets.

Recent work by Pacific Ridge, and also by some companies within the White gold district, has shown that structural discontinuities are favourable hosts for gold mineralization. Both airborne and ground magnetic surveys have been successfully used as mapping tools for delineation of these structures, as well as alteration patterns and underlying rock types. The integration of geophysical results with gold-in-soil geochemical trends is therefore considered an effective method for identification of drill targets.

Follow-up ground magnetic and electromagnetic surveying will also be conducted in advance of this year’s drill program at Mariposa. This survey will be conducted at greater detail than the aeromagnetic coverage and will provide optimum definition of targets for initial drill holes. Commencement of drilling is planned for mid-June.

During the period to April 7, 2011, exercise of 15-cent share purchase warrants has resulted in the issuance of 1,205,643 common shares with funds received in the amount of $180,846.

The technical information in this release has been reviewed by Janice Fingler, PGeo, who acts as the company’s qualified person for the purposes of NI 43-101.

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PACIFIC RIDGE REPORTS FULL EXERCISE OF OCTOBER 21ST SHARE PURCHASE WARRANTS

Pacific Ridge Exploration Ltd. has received $359,375 from the exercise of 1,437,501 share purchase warrants with an exercise price of 25 cents and an expiry date of Oct. 21, 2010. The company now has 37,090,077 common shares issued and outstanding.

On Sept. 20, 2010, it was previously reported that 700,000 share purchase warrants were exercised at a price of 25 cents per share with the company then receiving gross proceeds in the amount of $175,000.

With respect to the Pacific Ridge Mariposa, Gold Cap and Polar/Steward properties located within the Yukon’s South Klondike-White Gold area, additional assay results from trench sampling and soil sampling surveys remain pending, and will be reported when received and compiled during the balance of this year. Plans for the Pacific Ridge 2011 exploration program are under way, additional exploration staff have been engaged and the company will soon issue a request for tenders from diamond drilling contractors.

Pacific Ridge’s disclosure of a technical or scientific nature in this press release has been reviewed and approved by George Norman, PGeo, Pacific Ridge’s exploration manager, who serves as a qualified person under the definition of National Instrument 43-101. Quality-assurance and quality-control procedures include the systematic insertion of blanks, duplicates and standards into trench sample sequence. Samples are placed in sealed bags and shipped directly to ACME Labs’ preparatory laboratory in Whitehorse prior to gold fire assay fusion by ICP-ES analysis. The Mariposa property is an early-stage exploration property and does not contain any mineral resources as defined by National Instrument 43-101.

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Trenching Defining Gold Zones at Mariposa GOLD

Pacific Ridge Exploration Ltd. (TSX Venture: PEX) reports gold assays received for the first two of five trenches recently excavated on its Mariposa property  located in the White Gold area of Yukon’s South Klondike.

Assays from backhoe trenching are reporting broad intervals of gold mineralization  within  the open-ended, 1100 by 600 metre, Skookum Jim geochemical  anomaly which contains  gold-in-soil values reaching 1,500 ppb (parts per billion) gold.

Trench SJ-2 was excavated 590 metres in length within which the following gold zones have been identified:

                                   Interval (metres)          Length (metres)      Gold (grams/tonne; fire assay)  
                                            150 -255                         105                                  0.67
Includes                             150- 200                          50                                   0.91
Including                            150- 180                          30                                   1.25
                                             225- 255                          30                                   0.76
Includes                             225- 235                          10                                   1.17

Trench SJ-2 was excavated to an approximate one metre depth with composite rock samples collected over 5-metre intervals. Sections of subcrop and rubble indicate near bedrock sources. Rock type within zones hosting gold values consists of altered and oxidized gneiss, schist and quartzite which host quartz veining, stockwork fractures and breccia with minor sulphide mineralization and hematite. The presence of widespread limonite as disseminations and fracture fills, as well as quartz stockworks and both hydrothermal and tectonic breccias provide clear evidence that brittle deformation and hydrothermal activity has affected this area.

Trench SJ-2  comprises a significant target for diamond drill testing  early in the 2011 field season.

Trench SJ-1, located 200 metres west of trench  SJ-2 was excavated over a 240 metre length reporting  anomalous gold, averaging 3210 ppb  over 5 metres from 20 to 25 metres and 492 ppb Au over 5 metres from 155 to 160 metres within altered zones exhibiting quartz veining.

Assays are pending for trenches S-J  3, 4, and 5 .

One trench was completed within the Maisy May gold-in-soils anomaly, for which assays are pending.

Pacific Ridge will report trench assays and additional soil sampling results as will be received during the balance of the year.  With the onset of winter conditions on-going exploration in the field will see resumption during the spring of 2011.                                                                                                                                                                                                  

“John S. Brock”
John S. Brock
President

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