A mountain endurance event near Douglas, Wyoming offering 24-hour, 12-hour, and single-summit formats on a rugged lap of about 9 miles and 3,000 feet of vertical gain. Basecamp at Friend Park Campground provides food and medical support.

Saturday Jul 18

Skunk Hollow Sneaker Chase

Casper - 46 mi from Douglas

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4 mi

8 mi

Trail event on Casper Mountain with an 8 mile two-lap race and a Backyard Ultra on a 4.17 mile loop run each hour until one runner remains. Trails are forested cross-country ski and single-track at 7800 to 8100 feet.

August 2026

Friday Aug 14

Night Crawler Endurance Challenge

Casper - 46 mi from Douglas

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Backyard Ultra

An overnight time-based trail event on Casper Mountain with 4 hour and 12 hour solo options plus a 12 hour 4 person relay. Held Aug 14-15, 2026 near the Casper Mountain Trails Center in Casper, WY.

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