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Bigfoot 20 Mile Run

Cougar, United States • 14 Aug 2026

Bigfoot 20 Mile Run takes place in Cougar, Washington, starting at Marble Mountain Sno Park on Mount St. Helens. The 20-mile course follows the volcano’s southwestern flank on 100% single-track trails, weaving lava fields, stream crossings, old-growth forests, and high-country terrain.

It’s a remote, rugged route with limited aid—only one aid station for the 20-mile distance, reflecting its remoteness. Runners traverse Mt. St.

Helens’ backcountry and desolation zone, offering a magical yet challenging experience. A course map is available and registration closes ahead of race day; check-in is required at Marble Mountain Sno Park. A nine-hour cutoff applies for safety. Visit the organization's website for the most recent information.

United States Washington Cougar

Race information

Website
20 mi
20 Mile
Visit the organization's website for the most recent information.
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