Mount Jefferson, in Nevada’s Toquima Range, is the highest mountain in both the range and Nye County, with its South Summit reaching 11,949 feet and ranking as the state’s sixth highest peak. In the Alta Toquima Wilderness of Humboldt-Toiyabe National Forest, it is especially distinguished by its isolation and prominence, rising 5,861 feet above the broad basins around it. Its broad summit area includes three distinct summits rather than a single sharp peak, and its dominance extends more than 90 miles in every direction. The mountain also preserves evidence of Pleistocene glaciation, with cirques carved on the east side of its summit plateau.