Logo

Night Crawler Endurance Challenge

Casper, United States • 22-23 Aug 2025

The Night Crawler Endurance Challenge is a unique overnight solo ultramarathon held on Casper Mountain in Wyoming, featuring 4-hour and 12-hour race options. Set at an elevation of 8,100 feet, runners traverse forested trails starting from the Nordic stadium near the Casper Mountain Trails Center. The event fosters a supportive atmosphere where participants can rest between laps in a communal start/finish area equipped for tents and hammocks. The flexible format allows runners to complete as many laps as they choose within their time limit, with no official DNFs. Awards are given to top finishers, and all participants receive finisher recognition. Visit the organization's website for the most recent information.

United States Wyoming Casper

Race information

Website Registration
12 hr
12 Hours
4 hr
4 Hours
Visit the organization's website for the most recent information.
Trail runs nearby

Trail Mix Run Wyoming

Casper

The Trail Mix Run Wyoming is an exciting mixed surface running event taking place in Casper, Wyoming, featuring 3-mile and 10-mile courses that include challenging hills, spring creeks, and often muddy conditions. There is also a 3-mile route that is wheelchair and stroller accessible, welcoming wal..

Skunk Hollow Sneaker Chase

Casper

The Skunk Hollow Sneaker Chase & Backyard Ultra takes place at Casper Mountain Trails Center in Casper, Wyoming. The event offers two race options: an 8-mile run consisting of two 4.17-mile laps, and Wyoming's first true Backyard Ultra, where runners complete a 4.17-mile loop every hour until only o..