Night Crawler 12 Hour Endurance Challenge

August 14th 2026
Casper, WY
12 Hours

The Night Crawler 12-hour Endurance Challenge is a solo ultramarathon and team relay, run overnight under the light of the moon through the forested trails atop beautiful 8,100-foot Casper Mountain. Run as a solo ultrarunner, or get your fellow night crawling friends together for a 2 or 4-person relay team. The Night Crawler begins at 6:30 PM on Friday evening continuing throughout the night and finishes at 6:30 AM on Saturday as the sun rises. Enjoy the camaraderie of our awesome trail running community and the scenery that our mountain gem has to offer. Are you up for the challenge? https://nightcrawler12-hourec.weebly.com/

Upcoming Races

Aug 14 2026
12 Hours
Multiple Loop
3 Elevation Rating
Hilly, ~2500-7500 feet in 50 miles
3 Surface Rating
Some rocks, root, and/or ruts

Results

12 Hours

Date Finishers Top Result (F) Top Result (M)
08/22/25 18 48 56
08/23/24 17 46.1 51
08/25/23 14 40 56
08/26/22 26 51 52.5
08/27/21 17 46 54
08/28/20 18 32 57.5
08/23/19 11 40 52.5
08/24/18 10 44 51.3

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Rise in the Pines
Smithville, TX - 70 finishers
100 Miles | 100 KM | 50 KM
Stunner Night Runs
Mesa, AZ - 64 finishers
50 KM
Siskiyou Out Back
Ashland, OR - 331 finishers
100 Miles | 100 KM | 50 KM
Knee Knackering North Shore Trail Run
North Vancouver, BC - 193 finishers
30 Miles
Hardin-Meade Endurance Run
Elizabethtown, KY - 39 finishers
50 KM
Spaulding Woods 50K
Northfield, NH - 52 finishers
50 KM
Honey Badger 100
Kingman, KS - 6 finishers
100 Miles
Summit 700 Trail Runs
Blue Mountain, ON - 117 finishers
50 KM
Red Wing Trail Challenge
Lagrangeville, NY - 9 finishers
60 KM
View All Results