Trading Symbol: TSX -MTB Frankfurt-M9U.F OTC-MBYMF STEWART, BC, May 22 /PRNewswire-FirstCall/ -- Mountain Boy Minerals Ltd announces that assays for all the drill holes for the 2007 drilling exploration program on the 100 % owned BA claims have been received and compiled. The BA claims are located 30 km east of Stewart in the Skeena mining division approximately 3 kilometers south of paved Highway 37A. The BA mineralization is part of a large mineral system occurring in mudstones overlying felsic volcanic rocks that are present in a large circular synclinal structure underlying the property. Based on the Geological Survey of Canada Open File 2931, mapping in this area shows that the felsic horizon occurs over 12 kilometers of strike length within the property area. The map showing this horizon in relation to the property boundaries can be viewed on the company website at http://www.mountainboyminerals.ca/ba/index.html A total of 26 were drilled on the main exposed high grade silver - massive sulphide horizon with 5 holes testing for a southerly extension beneath overlying sediments. A map showing the location of these holes (figure 5) can be viewed at http://www.mountainboyminerals.ca/ba/galleryBaGallery.htm. Zinc-silver and lead values within the high grade silver - massive sulphide horizon on the BA claims were intersected over at least 500 meters in strike length in a volcanic rock unit traced for over 5 kilometers along the west side of the synclinal structure. In the immediate area of drilling, the mineralized zone has been mapped and sampled for over 1 kilometer of strike length. Highlights of drilling includes 6.1 meters of 29.0 g/t silver, 0.46 % lead and 4.79 % zinc in DDH-2007-BA-20, 4.57 meters of 23.5 g/t silver, 0.41 % lead and 4.48 % zinc, 4.3 meters of 202.5 g/t silver, 0.77 % lead and 3.85 % zinc in DDH-2007-BA-21 and 3.05 meters of 241.1 g/t silver, 0.11 % lead and 1.24% zinc in DDH-2007-BA-25. The mineralized zone is located in the upper parts of Bear Glacier Valley within the same stratigraphic horizon as that which hosts the Eskay Creek deposit. The company believes that the zone represents the upper portion of a Kuroko-type volcanogenic massive sulphide (VMS) system composed of an exhalite horizon with related zinc-lead-silver mineralization. This mineralization consisting of finely bedded sphalerite and pyrite with minor galena and chalcopyrite occurs below the main exhalite (red jasper/green to grey chert) horizon and is located within mudstones, mudstone breccias and dacite breccias. Mineralized rocks are at least 40 meters to 50 meters wide and mineralization in the area of drilling can be traced for over 1 kilometer of strike length and is open along strike and to depth. A zone 3 kilometers south of the drilling with grab samples giving 12 % zinc and 698 g/t silver are within the same stratigraphic horizon as the results below. The horizon which is strongly folded to the north of the drilling has been traced for at least 1 kilometer in that direction. Four post mineral dykes ranging in width from 1.5 to 2 meters cut through the mineralized horizon. In general, silver values appear to be enhanced in areas with elevated copper values. Replacement type mineralization carrying barite and locally massive galena with minor sphalerite and chalcopyrite is also present along the footwall region of the mineralized horizon. High grade silver values are associated with this type of mineralization. Assays received for drill holes BA-2007-18-26 and BAH-2007-1-5 with results greater than 1 % zinc are listed in the table below: From To Width Ag Pb Zn DDH (m) (m) (m) g/t % % ------------------------------------------------------------------------- 2007- BA-19 1.22 8.99 7.77 23.84 0.34 1.56 ------------------------------------------------------------------------- and 16.46 22.56 6.1 37.5 0.38 1.67 ------------------------------------------------------------------------- and 25.61 28.65 3.05 15.2 0.23 1.91 ------------------------------------------------------------------------- and 83.54 98.78 15.24 29.74 0.38 1.78 ------------------------------------------------------------------------- 2007- BA-20 1.83 7.93 6.1 29.0 0.46 4.79 ------------------------------------------------------------------------- Hole Entered dyke for rest of hole ------------------------------------------------------------------------- 2007- BA-21 1.83 6.40 4.57 23.5 0.41 4.48 ------------------------------------------------------------------------- and 53.96 59.60 5.6 36.48 0.28 1.87 ------------------------------------------------------------------------- and 62.2 66.46 4.3 202.5 0.77 3.85 ------------------------------------------------------------------------- 2007- BA-22 1.52 7.93 6.4 22.27 0.41 4.83 ------------------------------------------------------------------------- and 14.94 21.04 6.1 9.55 0.23 1.36 ------------------------------------------------------------------------- and 36.89 38.41 1.52 112 0.55 3.1 ------------------------------------------------------------------------- and 42.38 45.38 3.05 149.8 0.83 1.07 ------------------------------------------------------------------------- and 51.52 58.23 6.7 166.9 0.76 1.30 ------------------------------------------------------------------------- 2007- BA-23 0.61 4.27 3.66 13.7 0.2 1.13 ------------------------------------------------------------------------- and 25.61 28.66 3.05 44.5 0.66 1.1 ------------------------------------------------------------------------- and 37.50 43.9 6.4 14.9 0.31 1.50 ------------------------------------------------------------------------- and 51.52 53.05 1.52 56.2 1.28 2.28 ------------------------------------------------------------------------- and 61.28 64.48 3.20 8.3 0.18 1.39 ------------------------------------------------------------------------- and 110.98 114.02 3.05 69.8 0.27 1.51 ------------------------------------------------------------------------- and 190.24 192.99 2.74 36.3 0.59 1.29 ------------------------------------------------------------------------- 2007- BA-24 10.52 13.11 2.59 36.1 0.39 3.2 ------------------------------------------------------------------------- and 36.28 40.18 3.90 23.1 0.18 2.13 ------------------------------------------------------------------------- and 41.31 43.29 1.98 46.2 0.83 1.11 ------------------------------------------------------------------------- and 53.35 56.10 2.74 20.9 0.47 1.35 ------------------------------------------------------------------------- 2007- BA-25 19.97 22.56 2.59 26.3 0.36 2.16 ------------------------------------------------------------------------- and 28.66 31.71 3.05 13.4 0.27 1.02 ------------------------------------------------------------------------- and 34.76 36.28 1.52 16.1 0.27 1.02 ------------------------------------------------------------------------- and 50.0 51.52 1.52 124.4 1.36 1.28 ------------------------------------------------------------------------- and 57.77 60.77 2.90 11.2 0.26 1.31 ------------------------------------------------------------------------- and 71.34 74.39 3.05 241.1 0.11 1.24 ------------------------------------------------------------------------- 2007- BA-26 23.48 26.52 3.05 13.4 0.19 1.17 ------------------------------------------------------------------------- and 35.67 37.2 1.52 20.8 0.41 1.3 ------------------------------------------------------------------------- and 53.96 57.01 3.05 28 0.69 2.98 ------------------------------------------------------------------------- (xx)2007- BAH-5 19.21 22.26 3.05 41.9 0.2 2.21 ------------------------------------------------------------------------- (xx) Hole lost at 50.30m. DDH-2007-18 was collared in the footwall to the zone and did not intersect any values. DDH-2007-BAH-1-4 were drilled at shallow dips and only intersected weakly pyritic dacite, not the main mudstone sequence. DDH-2007-BAH-5 was lost prior to intersecting the main mudstone sequence outcropping at surface to the west. The company plans to continue drilling this property in 2008 with 2 drills. The company plans to survey all drill holes, prepare a detailed topographic map of the immediate area of drilling, conduct specific gravity tests on the mineralized rock and complete infill and step-out drilling. This work will be carried out in order to complete a resource calculation by the end of 2008. E. Kruchkowski, P. Geo., a qualified person under National Instrument 43-101, is in charge of the exploration program on behalf of the Company. Drill core and surface samples are assayed by Assayers Canada of Vancouver, BC. Mountain Boy Minerals Ltd is a Canadian based mineral exploration company whose activities are in the Stewart and McKenzie area of BC. It is actively exploring for gold-silver-base metals on the Silver Coin project, silver-base metals on their American Creek properties, copper-gold in the Stewart area, porphyry molybdenum in the Stewart and McKenzie areas and copper-nickel-platinum group metals in the McKenzie area. ON BEHALF OF THE BOARD "Ed Kruchkowski" Ed Kruchkowski, Director This news release may contain certain forward-looking statements, including management's assessment of future plans and operations, and capital expenditures and the timing thereof, that involve substantial known and unknown risks and uncertainties, certain of which are beyond the Company's control. There can be no assurance that such statements will prove accurate, and actual results and developments are likely to differ, in some case materially, from those expressed or implied by the forward-looking statements contained in this press release. Readers of this press release are cautioned not to place undue reliance on any such forward-looking statements. CONTACT: John Thornton at (778) 855-7823; or Ed Kruchkowski at (250) 636-9232; or visit the website at http://www.mountainboyminerals.ca/ DATASOURCE: Mountain Boy Minerals Ltd. CONTACT: John Thornton at (778) 855-7823; or Ed Kruchkowski at (250) 636-9232; or visit the website at http://www.mountainboyminerals.ca/

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