Gannett Peak is the highest mountain peak in the U.S. state of Wyoming at 13,810 feet. It lies in the Wind River Range within the Bridger Wilderness of the Bridger-Teton National Forest. Straddling the Continental Divide along the boundary between Fremont and Sublette counties, it has the second greatest topographic prominence in the st…Gannett Peak is the highest mountain peak in the U.S. state of Wyoming at 13,810 feet. It lies in the Wind River Range within the Bridger Wilderness of the Bridger-Teton National Forest. Straddling the Continental Divide along the boundary between Fremont and Sublette counties, it has the second greatest topographic prominence in the state after Cloud Peak, and is the highest ground for 290.36 miles in any direction.