The Cleo 29 occurrence is near the northwestern head waters of Matthew Creek, approximately 2 kilometres southeast of Higgins Peak.

The area is underlain by argillites and quartzites of the middle Proterozoic Aldridge Formation (Purcell Supergroup). These have been intruded by gabbro sills and dikes of the middle Proterozoic Moyie Intrusions.

Locally, a limonitic fault breccia with albitized zones hosts hairline stock works of magnetite and pyrite.

In 1997, a sample (133116) assayed 0.531 per cent lead, greater than 1 per cent zinc and 10.2 grams per tonne silver (Assessment Report 25326).

In 1985 and 1986, Amstar American completed programs of geological mapping, soil and rock sampling and ground and airborne geophysical surveys on the area as the Bootleg claims. In 1993, Cominco completed an 8.5 line-kilometre ground electromagnetic survey on the area as the Mat claims. Also, in 1996, Eagle Plains Resources Ltd. and Miner River Resources Ltd completed a two-day geological reconnaissance program consisting of stream sediment sampling and prospecting. During 1996 through 1999, Abitibi Mining completed exploration programs of rock, soil and silt sampling, prospecting and geological mapping on the area as the Clair, Cleo and PMR claims. In 1999 and 2000, Rio Algom Exploration completed exploration programs on the area as the Pyramid Peak property consisting of geological mapping and rock sampling.