Night Crawler Endurance Challenge
Casper, United States • 14 Aug 2026
Night Crawler Endurance Challenge
The Night Crawler Endurance Challenge is an overnight time-based trail running event on Friday, August 14, 2026, held on Casper Mountain in Casper, WY. The start/finish/lap area is in the Nordic stadium near the Casper Mountain Trails Center at 9301 Casper Mountain Rd. The course runs on forested trails near the 8,100-foot summit and the Trails Center parking lot is available for participants.
Event options include:
- 4-hour solo running option.
- 12-hour solo running option.
- 12-hour 4-person relay team option.
The format allows participants to run and rest as they choose; runners do not need to be on course for the entire 4 or 12 hours. Organizers request that participants notify staff if they take an extended break between laps or finish early so no search is required. Every participant receives a finisher award and the event notes that there is no DNF designation. Awards are given to top overall female and male in 4-hour and 12-hour solo divisions and to the top 12-hour relay team. The event is presented in partnership with WYRun and Fat Fish Racing and is the tenth edition. A separate Bear Bait 8 cross country mountain bike race is scheduled the following day.
Registration closes Wednesday, August 12, 2026 at 11:59 PM MT. Late packet pick-up on Thursday, August 13 at Complete Physical Therapy, 2948 Hogan Dr, is available for an additional $5 cash or check only. There is no race day registration. The first 50 registrants are guaranteed a race souvenir. Visit the organization's website for the most recent information.