| Haydon Peak | |
| Elevation Ft: | 11924 |
| Elevation Ref: | [1] |
| Prominence Ft: | 1674 |
| Isolation Mi: | 3.04 |
| Parent Peak: | Mount Saint Elias (18,008 ft) |
| Etymology: | Henry E. Haydon |
| Listing: | Highest major summits of the US Mountain peaks of Alaska Major summits of North America |
| Range: | Saint Elias Mountains[2] |
| Map: | USA Alaska |
| Map Size: | 270 |
| Label Position: | left |
| Country: | United States |
| State: | Alaska |
| Region: | Yakutat |
| Region Type: | Borough |
| Part Type: | Protected area |
| Part: | Wrangell–St. Elias National Park |
| Coordinates: | 60.261°N -140.988°W |
| Coordinates Ref: | [3] |
| Topo: | USGS Mount Saint Elias B-8 |
| Age: | Mesozoic |
| Rock: | Schist[4] |
| Easiest Route: | Expedition climbing |
Haydon Peak is an 11924feet mountain summit in Alaska, United States.
Haydon Peak is part of the Saint Elias Mountains in Wrangell–St. Elias National Park and Preserve.[2] The glaciated peak is located 3.5miles southwest of Mount Saint Elias and 66miles northwest of Yakutat, Alaska. The mountain is surrounded by the Libbey Glacier to the east and Tyndall Glacier to the west. Precipitation runoff and glacial meltwater from the mountain flows south to the Gulf of Alaska. Topographic relief is significant as the summit rises 8,300 feet (2,530 m) above the head of Libbey Glacier in two miles (3.2 km).
The mountain was named "Hadon Peak" in 1888 by mountaineer Harold Ward Topham for Mr. and Mrs. Henry E. Haydon.[5] Henry Haydon was Secretary of the District of Alaska at the time of Topham's expedition to Mount Saint Elias.[3] Topham's failed 1888 expedition only reached an elevation of 11,460-feet on Mt. Saint Elias' south side,[6] so a close view of Haydon Peak was possible.[7] The mountain's toponym was officially adopted in 1917 by the U.S. Board on Geographic Names.[3]
Based on the Köppen climate classification, Haydon Peak is located in a tundra climate zone with long, cold, snowy winters, and cool summers.[8] Weather systems coming off the Gulf of Alaska are forced upwards by the Saint Elias Mountains (orographic lift), causing heavy precipitation in the form of rainfall and snowfall. Winter temperatures can drop below −10 °F with wind chill factors below −20 °F. This climate supports several glaciers surrounding this peak. The months May through June offer the most favorable weather for viewing or climbing.