The Renning occurrence is located on the southern side of the northeast end of East Barriere Lake, approximately 30 kilometres northeast of Barriere and 80 kilometres northwest of Kamloops.

The area is underlain by probable Lower Cambrian to Hadrynian Spapilem Creek–Deadfall Creek Succession (unit SDQ, Map 56). The rocks consist of quartzite, micaceous quartzite, grit and phyllite, with lesser staurolite-garnet-mica schist, calc-silicate schist and amphibolite. These rocks are cut by Late Devonian orthogneiss and sillimanite-bearing paragneiss (unit Dgnp). To the northeast, the rocks are cut by post-tectonic granitic rocks of the Mid-Cretaceous Baldy Batholith.

A vein 0.5 to 0.6 metre wide is traced for 4.6 metres along a strike of 120 degrees and a dip of 65 degrees southwest within quartz-biotite feldspar schist.

Mineralization consists of pyrite and chalcopyrite with traces of bornite and covellite occurring as streaks and stringers within the quartz vein.

Barriere Mines Ltd. held the property prior to 1967 and is reported to have completed between six and eight drillholes on the property, but no assays or core logs have been made available. From 1967 to 1969, Westbrun Exploration Ltd. held the property, then known as the East Barriere Lake Prospect. Exploration in 1968 consisted of bulldozing, drilling and sampling of the Grizzly 1 Trench, sampling of a quartz vein over an 11-metre (35-foot) width and an electromagnetic geophysical survey. Souvenir Mines Limited of Calgary acquired the property in 1969 and commissioned Angus G. MacKenzie Mining Consultants Limited to conduct an exploration program on the property. Exploration activity consisted of a preliminary geological study, ground magnetic geophysical surveying and the collection of five grab samples—four from the Grizzly 1 Trench and one from the Bex Trench (Fennell zone, MINFILE 082M 117) on the adjacent Barriere Exploration property. The area was restaked by Trans-West Minerals in 1980 and, in 1981, the holdings were consolidated with the Fennell property (MINFILE 082M 117). The Grizzly Trench was mapped and sampled in 1982. Ten samples, four grab samples and six chip samples were collected over a 135-metre trench width. In 2005 and 2006, Jay Murphy conducted a geological mapping program over the Grizzly zone to the northeast.

Several grab samples along a 10.6-metre length of the vein averaged 6.9 grams per tonne silver, 0.1 per cent zinc and traces of lead and copper (Assessment Report 2231).