The Testalinden showing is located at about 1400 metres, 3 kilometres northeast of Mount Kobau and north of Testalinden Creek. The showing was located during exploration of the Richter claim group by Minnova Inc. in 1990.

Regionally, the Testalinden showing is hosted by polydeformed regionally metamorphosed sedimentary and volcanic rocks of the Carboniferous to Permian Kobau Group. The aerial distribution of Kobau Group rocks is restricted by the Similkameen River to the west and the Okanagan fault to the east. These rocks have been affected by regional metamorphism reaching greenschist grade, thought to have been attained during the first phase of regional deformation. The Similkameen batholith is located 1.5 kilometres to the southwest. Several satellite stocks including Osoyoos and Testalinden granodiorite of the Similkameen batholith occur in the area.

The Kobau Group rocks have been subdivided into up to three main units; generally consisting of quartzite, phyllite and calcareous phyllite. The Kobau Group rocks have a northwest trending schistosity as well as a major northwest trending fold axis.

The Testalinden showing consists of a gossan along the contact of Kobau Group rocks with Testalinden granodiorite, a stock of the Similkameen batholith. Silicification is intense and quartz veins are common along this contact. The quartz veins are 1 to 5 centimetres wide, lack visible sulphides and form a stockwork. Alteration and quartz veining are generally related to fault structures. Sample RG280 from this gossan yielded 6.8 grams per tonne gold, 1.9 grams per tonne silver and 0.12 per cent zinc (Assessment Report 19284).