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 8,100 feet elevation, runners traverse forested trails starting and finishing at the Nordic stadium near the Casper Mountain Trails Center. Participants can run laps at their own pace, resting between laps in a communal area with tents and chairs, fostering a supportive trail running community.

The event emphasizes personal achievement with no official "Did Not Finish" status. Awards are given to top finishers, and all participants receive finisher recognition. This event offers a challenging and scenic endurance experience under the stars. Visit the organization's website for the most recent information.

Race information

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

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, featuring a 4.17-mile loop run every hour until only one runner..