Courthouse Mountain is a 12,152-foot summit in southwestern Colorado’s San Juan Mountains, on the boundary of Hinsdale and Ouray counties in the Uncompahgre Wilderness. Its striking setting comes from a steep east face that rises nearly 2,000 feet above the West Fork Cimarron River in about half a mile, making it prominent and visible from Highway 550 near Ridgway. The name was in use before 1906, when Henry Gannett recorded it in the Gazetteer of Colorado, and it was later officially adopted by the United States Board on Geographic Names. In its alpine subarctic climate, runoff drains east to the Cimarron River and west to the Uncompahgre River through Cow Creek.