Mount Witherspoon is a 12,012-foot-elevation (3,661 meter) glaciated summit located 36 mi (58 km) northwest of Valdez in the Chugach Mountains of the U.S. state of Alaska.

[6] The mountain's name was officially adopted in 1928 by the U.S. Board on Geographic Names to honor David C. Witherspoon, a U.S. Geological Survey topographer for 30 years, "who at the time of his retirement in 1921 had mapped a greater area of Alaska than any other man.

"[6] The first ascent of Mount Witherspoon was made June 25, 1957, by David Bohn, Arthur Maki, Jr., Martin Mushkin, and Lawrence E.

[7] Weather systems coming off the Gulf of Alaska are forced upwards by the Chugach Mountains (orographic lift), causing heavy precipitation in the form of rainfall and snowfall.

This climate supports the Harvard, Yale, and Columbia Glaciers surrounding this mountain.