Ross River Minerals Inc

New Grid Extends Copper Mineralisation at El Pulpo

Vancouver, Canada (ots/PRNewswire) - Ross River Minerals Inc. (TSX-V: RRM) (the "Company") has received analyses of 34 lithogeochemical samples from the Cetolla area. Copper analyses ranged from 44.30 ppm Cu to greater than 10,000 ppm Cu (approximately 1%). Four samples exceeded the detection limit of 10,000 ppm Cu. Molybdenum analytical results ranged from 1.07 ppm Mo to 1,902.64 ppm Mo. Silver analyses ranged from 116 ppb Ag to 70,701 ppb Ag, with nine samples exceeding 10,000 ppb, approximately 10 grams per tonne. Gold analyses ranged from 1 ppb Au to 805.5 ppb Au. A new road built one kilometre northeast of the Minitas copper prospect gave improved access to the Jocquistes copper prospect two kilometres northeast of Minitas as well as the Cetolla prospect three kilometres north of Minitas. Results have been received for 179 lithogeochemical samples from the Jocquistes area. Three samples exceeded the detection limit for copper and ten other samples contained greater than 5,000 ppm Cu. Results for molybdenum ranged from 0.67 ppm Mo to 1,723.92 ppm Mo. Six samples exceeded 500 ppm Mo and two of those contained greater than 1,000 ppm Mo. Fourteen samples contained greater than 10,000 ppb Ag, and one of those exceeded the detection limit of 100,000 ppb Ag. One sample contained greater than 1,000 ppb Au, approximately 1 gram per tonne. In April and May of 2005 prospecting, mapping and sampling was extended east of the 2004 geophysical and geochemical grid into the Minitas, Jocquistes and Cetolla areas. A total 77.47 line-kilometres of soil geochemistry and 56.16 line-kilometres of IP and magnetometer surveys were carried out over an area of 16 square kilometres. Disseminated and stockwork copper mineralisation was discovered in the canyons north of the Minitas copper prospect, which had earlier detected higher-grade mineralisation related to low-angle quartz veins and associated phyllic alteration. Subsequent work extended the disseminated mineralisation northward into the area of a rhyolite intrusive coincident with an observed increase in molybdenite mineralisation. Five hundred eighty (580) analytical results have been received for the lithogeochemical samples taken in this area. Copper results range from 5.48 ppm Cu to greater than 10,000 ppm Cu. Twelve samples exceeded the detection limit of 10,000 ppm Cu and an additional 20 samples exceeded 5,000 ppm Cu. Analytical results for molybdenum range from 0.51 ppm Mo to greater than 2,000 ppm Mo. Ten samples exceeded the detection limit of 2,000 ppm Mo and seventeen samples contained greater than 500 ppm Mo, including seven that contained greater than 1,000 ppm Mo. Silver results range from 39 ppb Ag to greater than 100,000 ppb Ag. Nine samples exceeded the detection limit of 100,000 ppb Ag and 105 other samples contained greater than 10,000 ppb Ag. Gold analyses range from less than the detection limit to 7,396 ppb Au, approximately 7.3 grams per tonne. Nine samples exceeded 1 gram per tonne. The El Pulpo copper porphyry project, located 125 kilometres northeast of Mazatlan, Sinaloa State, Mexico, now covers an area of approximately 40 square kilometres and has five centres of copper mineralisation - Cerro Colorado, La Langosta, La Cetolla, Jocquistes and Minitas. The El Pulpo property covers an area of approximately 200 square kilometres of which less than one third has been explored to date. Analyses were conducted by Acme Laboratories in Vancouver BC. All samples exceeding the detection limit of the analytical technique will be reanalysed by techniques appropriate to their higher grades. James R. Reeves P.Geo was the qualified person supervising the exploration program. To find out more about Ross River Minerals Inc. (TSX-V: RRM) visit our website at www.rossriverminerals.com. The TSX Venture Exchange has not reviewed and does not accept responsibility for the accuracy or the adequacy of this release. ots Originaltext: Ross River Minerals Inc Im Internet recherchierbar: http://www.presseportal.ch Contact: Ross River Minerals Inc., Telephone: +1-604-682-2770, Facsimile: +1-604-682-2331

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