Ape Canyon is a gorge along the edge of the Plains of Abraham, on the southeast shoulder of Mount St. Helens in the U.S. state of Washington.

The name alludes to a legend about a 1924 encounter with "apemen" which was later incorporated into Bigfoot folklore.

In the summer of 1924, a group of gold prospectors claimed that 7 feet (2.1 m) tall ape-like animals attacked them with boulders.

The ape men supposedly returned later to bombard their cabin with large stones and leave giant footprints.

The story caused a local sensation, prompting U.S. Forest Service rangers J.H.