The Lake occurrence is located about 11 kilometres north of Tootsee Lake in the Cassiar Mountains, 2 kilometres south of the British Columbia-Yukon border.

The showing consists of quartz stringers with galena and sphalerite in a north trending shear zone in locally porphyritic biotite quartz monzonite of the Early Cretaceous Cassiar batholith. A vertical dipping gabbroic dike, about 3 metres wide, parallels the mineralized zone. Intrusive rocks within the shear zone are brecciated, sericitized and chloritized.

Lead isotopic signatures from the Lucky vein (104O 033) located 6 kilometres east, plot in a cluster with other local polymetallic occurrences of known mid-Cretaceous through Eocene age. Abbott (1984) has related the veins and replacements of the Rancheria district to small granites that post-date the main Cassiar batholith (Fieldwork 2000, page 62).

In 1971, Yucol Mines Ltd. conducted a limited ground VLF-EM and magnetometer survey.