Allies Southwest occurrence is located west of Cannell Creek at an elevation of 1410 metres and approximately 2.2 kilometres east-southeast of Sydney Lake.

Regionally, the area is underlain by basaltic volcanic rocks of the Upper Triassic Eastern Volcanic Facies of the Nicola Group and late Triassic to early Jurassic ultramafic rocks that have been overlain by undivided volcanic and basaltic volcanic rocks of the Eocene Kamloops Group and Miocene to Pleistocene Chilcotin Group. Lithologies include serpentinite, picrite, gabbro, chloritic andesite tuffs and greenstone with minor argillite, quartzite and conglomerate intruded by light- and dark-grey feldspar porphyry dikes. The dikes strike generally from 290 to 300 degrees.

Locally, a chloritized and oxidized shear zone in greenstone and quartz feldspar porphyry dikes hosting quartz-carbonate veins with pyrite, malachite and minor chalcopyrite is exposed above the ‘Southwest’ adit. The porphyry dikes vary up to 24 metres wide but average less than 1 metre in width.

In 1984, sampling of the shear zone yielded up to 1.05 grams per tonne gold in grab samples and 0.75 gram per tonne gold over 1.5 metres (Sample 85865 and 85864; Assessment Report 13445).

In 1986, a diamond drill hole (86-A-4) intercepted a feldspar-hornblende andesite-trachyandesite porphyry yielding 0.37 gram per tonne gold over 12.0 metres, including 1.32 grams per tonne gold over 1.0 metre (Assessment Report 15807).

The area has been explored in conjunction with the nearby Allies (MINFILE 092INE044) occurrence since the 1920s. A full description of early, prior to 1983, exploration programs can be found there.

In 1983, airborne magnetic and VLF-EM surveys were carried out by Stryder Explorations Ltd. over the Dog claim group. In 1984, title to the property was awarded to Laramide Resources Ltd. in a dispute over previous assessment work and, in that year, prospecting, grid layout, road construction, trenching, geological mapping and geochemical surveys were completed. The property was optioned to Relay Creek Resources in 1985 and further exploration was performed, including an induced polarization survey and backhoe trenching. In 1986, Relay Creek carried out a diamond drilling program consisting of five NQ drill holes, totalling 619 metres. In late 1987, three diamond drill holes, totalling 401.1 metres, were completed. During 1985 through 1989, ground magnetic and VLF-EM surveys, geological mapping and soil sampling were carried out over the Dog claims, adjacent to the Allies showing, by Trans-Arctic Explorations Ltd.

No further exploration work was reported on the original Allies showing from 1990 until 1997, when the property came open and R.B. Simpson acquired it by staking the Treadwell claim in October 1997. In 1998, prospecting was carried out by R.S. Simpson. During 2004 through 2007, programs of soil sampling and a total of 17.8 line-kilometres of induced polarization and resistivity surveys were completed. In 2010, Treadwell Resources completed eight diamond drill holes, totalling 1129.9 metres, on the Treadwell/Allies property.