Bigfoot 20 Mile Run

AUG

14

2026

Take on a 20 mile single track trail run around Mount St. Helens near Cougar, Washington, winding through lava fields, stream crossings and old growth forest. Rugged, scenic and unforgettable for trail lovers.

Fri 14 Aug 2026

Cougar, Washington

Website Registration

20 miles

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Event

The Bigfoot 20 Mile Run is scheduled for August 14, 2026, in Cougar, Washington. The route begins at Marble Mountain Sno Park on the southwestern side of Mount St. Helens, a volcano that erupted in 1980. The event takes place on National Forest lands. Registration for the event closes on August 2, 2026. There is a 9 hour cutoff for the course.

Course

The route is 20 miles long and is run entirely on single-track trails. The course passes through lava fields, includes stream crossings, and goes through old-growth forest and volcanic terrain. An interactive course map and a runner manual are available for more detailed course information. Visit the organization's website for the most recent information.

20 mi

Bigfoot 20 Mile Run