1. Geologic map of the Challis quadrangle, Custer and Lemhi counties, Idaho [cartographic material] Yale Public content 1987. 2002-06-01T04:00:00Z. 2012-07-11T15:29:50Z. McIntyre, David H. The Survey ; For sale by Map Distribution. English. Public. Idaho, Custer County, and Lemhi County.