Mount Sheridan, a 10,313-foot peak above Heart Lake in Yellowstone’s southern backcountry, became an important landmark in the Yellowstone basin for both its commanding views and its place in early exploration. Before its present name took hold, expeditions and surveys in 1870 and 1871 called it Brown Mountain, Yellow Mountain, and Red Mountain. On August 10, 1871, Captain John W. Barlow climbed the summit and named it for General Philip H. Sheridan of the U.S. Army. Nineteenth-century surveyors regarded the mountain as a central volcanic landmark tied to surrounding watersheds and geothermal features, and it remains prominent for its steep trail and sweeping panorama.