If you’re here in summer and have a few hours to spare, take the rough (no RVs, please!) but scenic alternative to Hwy-75, built by the Civilian Conservation Corps in the 1930s and called the Custer Motorway, which winds west from Challis into the Yankee Fork mining district, passing the remains of old stagecoach stations and stamp mills before reaching the ghost town of Custer. Custer now consists of a half-dozen mining shacks and log cabins, the Empire Saloon, and a small but engaging museum housed in the old one-room schoolhouse. Beyond Custer, a well-maintained gravel road follows the Yankee Fork of the Salmon River south to Hwy-75, passing an abandoned gold dredge and other relics of mining operations, past and present, before rejoining the highway at Sunbeam, on the banks of the Salmon River.

Further details, and free maps of Custer and the Custer Motorway, are available from the Land of Yankee Fork State Park visitors center (208/879-5244) in Challis.