All Press Releases for September 14, 2005

Major Land Package Of Gold Bearing Quartz Pebble Conglomerate Staked

Please to announce that the Company and its joint venture partner, Western Prospector Group Ltd. (TSXV-WNP) have completed additional staking

    Vancouver, BC - September 14th, 2004 / / -- John H. McAdam, President of Boulder Mining Corporation (TSXV-BDR) is pleased to announce that the Company and its joint venture partner, Western Prospector Group Ltd. (TSXV-WNP) have completed additional staking and now have five separate blocks exceeding 1100 mineral claims or about 240 square kilometres in the Indian River area of the Yukon. The target is a Witswatersrand style gold deposit hosted by quartz pebble conglomerate.

The claims were staked to cover virtually the entire sedimentary package in the region. These sediments host a gold bearing quartz pebble conglomerate. This effort was undertaken after it was established that the conglomerate was auriferous and that there is a compelling spatial regional relationship between conglomerate outcrop and placer mining activities. Where the conglomerate is exposed; there is or has been placer mining activity in nearby creeks. In fact, it is postulated that the conglomerates covered the entire Klondike area at one time. Erosion of the conglomerate no doubt liberated a large amount of gold and was in all probability a major contributor to the 11 million ounces of gold produced to date in the Klondike.

South of Indian River, where the claims were staked, a 500-meter thick gold bearing sedimentary unit hosts the quartz pebble conglomerate and also contains interbedded sandstone, siltstone and coal. This unit remains in place because the erosional level isn?t as deep and hence there is the potential for finding gold deposits in the conglomerate itself. The regional extent of the conglomerate unit would enhance the possibility of a very large gold deposit. These conglomerates are interpreted as braided river and alluvial fan-delta deposits and are not unlike the Witswatersrand Goldfields in South Africa. The Indian River area conglomerates are considered to be an outstanding exploration target for a Witwatersrand-style paleoplacer deposit.

As per the location plan to be posted on the Company?s website, the largest claim block, the FEN/COBBLE is part of the original Boulder Mining/Western Prospector joint venture wherein Boulder has the right to earn a 70% interest. The other four groups are owned jointly by both companies as to 50% each.

During the Company?s testing of the Indian River paleochannel deposits, coarse gold nuggets of up to 1 cm in size were discovered in an area which was subsequently sampled in trenches 22 and 23 where 1.135 and 1.731 raw grams of gold per tonne was previously reported on July 15th. That area also is underlain by interbedded conglomerate and sandstone which suggests a link between high grade gold values and the presence of conglomerate. Conglomerate samples were collected at numerous localities in the Indian River area and many yielded gold grains when crushed and panned.

Further research confirmed other gold bearing conglomerate occurrences in the Indian River area. In particular, two McKinnon brothers arrived in the Klondike from South Africa in 1899 as seasoned prospectors and located the Britannia claim on McKinnon Creek over gold bearing quartz pebble conglomerate. At least three shafts were sunk to depths of 18 to 30 meters (60 to 100 feet). A small test mill was erected to extract gold from material taken from the Britannia shaft. Some 2.5 tons were processed and the recovery is reported to have been 3.4 g/t Au. Cyanidation was used as a check method on similar material and two test gave values of 0.160 opt (4.98 g/t Au) and 0.350 opt (10.87 g/t Au). Assaying by other explorers subsequently gave values varying from trace to a high of 48 ounces per ton (1493 g/t Au). A surprising number of old trenches have been found on the Partners? claims representing an impressive amount of hand exploration work. Such amount of work would not have been undertaken without encouraging gold values.

The conglomerates consist predominantly of well-rounded pebbles and cobbles of vein quartz, quartzite and schist that are lithologically similar to the White Channel Gravels in the Klondike district. To date, testing has found that very fine gold (0.125-0.25 mm) is disseminated in the conglomerates of the upper quartzose unit exposed along McKinnon Creek, in a number of locations along the Indian River valley west of McKinnon Creek and in the Diversion Creek area draining into Ruby Creek. Gold occurs in the matrix between the quartzose clasts and so far has not been restricted to any horizon The gold appears to be disseminated throughout the conglomerates. Future work will be dedicated to finding ore grade horizons within this thick conglomerate bearing package.

Boulder Mining Corporation is also earning interests in the Tevrede IOCG (Iron Oxide Copper Gold) project in Namibia and the Breakaway Nickel Copper PGM project in the Raglan area of Quebec.

For further information please contact Brad Aelicks, VP Corporate Finance at (604) 899-4300. The Company also maintains a website at

On behalf of the Board of Directors

Boulder Mining Corporation

John H. McAdam

President and Director

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John John
Boulder Mining Corporation
Vancouver, British Columbia
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