Mount Doane el. 10,551 feet (3,216 m) is a mountain peak in the Absaroka Range in Yellowstone National Park. The peak is named for Lieutenant Gustavus Cheyney Doane, a U.S. Army cavalry officer who escorted the Washburn-Langford-Doane Expedition into Yellowstone in 1870. During that expedition, Doane and Nathaniel P. Langford ascended several peaks east of Yellowstone Lake. Henry D. Washburn, the leader of the expedition named a peak for Doane, but that peak's name was later changed to Mount Schurz. Mount Doane was officially named by the Hayden Geological Survey of 1871 to honor the first truly official report of an exploration of the Yellowstone region that Doane wrote after the Washburn expedition.