
This peak is not in the book. Published November 2021 Keystone Mountain is an unranked hump on the northeast ridge of Ramshorn Mountain (9,895 feet). It sits above Merrimac Gulch and Keystone Gulch and has a road to the top coming up Keystone Gulch from Garden Creek. USGS Bayhorse Access From the junction of US-93 and Main Street in Challis, … Continue reading