The Lost Mine showings consist of a 40 metre long adit at 1050 metres elevation, 975 metres north of the Valparaiso adit (082FSE038) and 30 metres south of the Gold King adit (082FSE096). These showings are located on the Martilde Reverted Crown grant (Lot 3870) and the Schumlka (Lot 3871), on the south side of Akokli Creek, about 2 kilometres from its mouth on the east side of Kootenay Lake.

The showings are described in Assessment Report 10811 as consisting of a shear zone (the same Val zone that hosts the Valparaiso) containing two fractured quartz veins, 0.4 and 0.6 metre thick, with an intervening zone of micaceous altered (greisenized) granodiorite of the middle Cretaceous Bayonne batholith. The zone totals 1.4 metres thick and strikes 020 degrees, dipping 70 degrees east. Weathered sulphides (mostly pyrite) with limonite are found chiefly in the footwall gouge zone; a channel sample assayed 0.7 gram per tonne gold and 27.4 grams per tonne silver (Assessment Report 10811).