Gannett Peak, Mountain summit in Wind River Range, Wyoming, US

Gannett Peak is the highest summit in Wyoming, reaching 13,810 feet (4,210 m) on the Continental Divide between Fremont and Sublette counties. Its upper slopes are bare gray and greenish-gray rock split by ridges and gullies, with a broad band of snow and ice across the middle and smaller patches near the top. Four glaciers—Gannett, Minor, Dinwoody and Gooseneck—cling to its flanks.

Gannett Peak was named in 1906 for the American geographer Henry Gannett. The first documented ascent was made in 1922 by Arthur Tate and Floyd Stahlnaker. The mountain lies on the Continental Divide, and its east side reaches the Wind River Indian Reservation of the Eastern Shoshone and Arapaho.

The peak is named after Henry Gannett, an American geographer whose work shaped mapping efforts in this region. The name honors his contributions to understanding the topography of these mountains.

Climbing here requires technical mountaineering skills and typically takes three to five days depending on the route selected. The main approaches are the Glacier Trail and Pole Creek Trail, each offering different terrain and conditions.

Gannett Peak is the highest ground for 290.36 miles (467.29 km) in any direction, and its summit is the apex of the Central Rockies across Wyoming, Idaho and Montana. The 896-acre (363 ha) Gannett Glacier spreads over the northern slopes, while Minor Glacier sits in the western cirque and the Dinwoody and Gooseneck glaciers lie on the southeast side.