Prospect Peak el. 9,527 feet (2,904 m) is a mountain peak in the Washburn Range of Yellowstone National Park. The summit is located approximately 6 miles (9.7 km) west southwest of Tower Junction. Between 1883-85, members of the Arnold Hague Geological Surveys named the peak Surprise Peak for reasons not now known. In 1880, then superintendent Philetus Norris had named the peak Mount Stephans for one of his assistants, C. N. Stephans. However, in 1885 Arnold Hague, for reasons again not known today, gave the peak its present name—Prospect Peak. The USGS has also mapped this summit as Mount Stephens.