The RASK occurrence is on lower valley sides west of Ottarasko Creek,12 kilometres west of Tatlayoko Lake, 41 kilometres south of the community of Tatla Lake on Highway 20 and 182 kilometres southwest of Williams Lake, B.C. The showing is based on a map symbol indicating gold and silver mineralization, near the headwaters of Ottarasko Creek (Geological Survey of Canada Map 5-1968).

The area is underlain by overlap assemblages between the northeastern margin of the Coast Plutonic Complex and the Tchaikazan fault to the northeast (Geological Survey of Canada Open File 1163, Map 1713A). This area is characterized by a complex belt of folds and imbricated, gently southwest-dipping thrust sheets (Geological Survey of Canada Open File 1163, Papers 88-1E, 89-1E; Geology 1991).

Very little information is available. A probable reference to the showing indicates that it comprises gold and silver-bearing veins in Lower Cretaceous sedimentary rocks and/or small intrusions related to the Jurassic to Tertiary Coast Plutonic Complex (Geological Survey of Canada Paper 68-33). The Lower Cretaceous unit that underlies the Rask appears to be the Cloud Drifter Formation which consists of siltstone, sandstone, greywacke and conglomerate. The MINFILE plot of the Rask shows a thrust-faulted package to the immediate east consisting of Lower Cretaceous Taylor Creek Group rhyolitic volcanics. Granodioritic stocks of the Tertiary to Paleocene Bendor suite intrude within a few kilometres west of the Rask showing.

From 2020 through 2022, Kingfisher Metals Corp. conducted regional exploration on their large Goldrange property, which included the RASK showing. No ground work was documented in the Rask area, but structural interpretations were made in 2022 from airborne data collected in 2020 over the large Goldrange project area.

Refer to the Cloud Drifter prospect (MINFILE 092N 095) or Langara (092N 036) for related geological and work history details.