Mount Edgecumbe (Tlingit: Lʼúx, Russian: Эджком) is located at the southern end of Kruzof Island, Alaska, about 15 miles (24 km) west of Sitka.

Mount Edgecumbe was a prop in a 1974 April Fools' Joke, which involved tricking the citizens of Sitka into believing the volcano was erupting.

[9] Captain James Cook passed the mountain on May 2, 1778, during his third voyage and named it Mount Edgecumbe, presumably after a hill overlooking Plymouth Harbor, England, or possibly for George, Earl of Edgcumbe.

[11] In the 1930s a trail to the top of the mountain was made by the Civilian Conservation Corps as part of a New Deal program to ease the Great Depression.

Edgecumbe Trail is roughly 6.8 miles (11 km), ascending through taiga and muskeg before becoming steep and ending in a barren landscape of snow and red volcanic ash above the treeline, at about 2,000 feet (610 m), with sign-posts directing hikers toward the crater rim.

"[18] On 23 May 2022 the AVO announced that they had "placed a seismometer and GPS sensor on Kruzof Island to better monitor the Mount Edgecumbe volcanic field.