2017 Map of Big Black Dome

About this map

Big Black Dome and Pyramid Peak anchor this high-altitude landscape within the Challis National Forest and Sawtooth National Forest. The map documents a rugged section of the Pioneer Mountains at the border of Custer and Blaine counties, where deep glacial carving is evident in Broad Canyon and Bellas Canyon. Water resources are concentrated in high basins, including Bellas Lakes and Clear Lake, which feed a network of streams such as Star Hope Cr and the E Fork Big Lost River. Access is defined by the Copper Basin Loop Rd FR 138, which services remote recreation sites like Starhope Creek Camping #1. The presence of The Potholes and Copper Basin suggests a geologically complex terrain where drainage patterns have been shaped by ancient alpine processes.