DateExpected
Mid August 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Nordic stadium near Casper Mountain Trails Center, 9301 Casper Mountain Rd., Casper, Wyoming
Casper, Natrona County
Countdown
August
Twelve hours from dusk to dawn on one looping trail, run solo or shared across a four-person relay. The night is the event, and the loop reverses every lap to keep it interesting.
Key facts
01Start 18:30, finish 06:30: most of the race is in the dark
02Choose 12-hour solo or a 4-person relay on the same course
03Direction alternates each lap, and you can rest between laps
Create a free training plan for the Night Crawler Endurance Challenge 12 hours
7-day free trial, no card required
The course
One lap, on repeat
Casper · one lap
Total climb366m
Duration12hr
Start · finishOne lap · elevation
0 kmDrag map to rotate14.2 km
Weather
Mid-August, Casper
31°CTypical high
15°CTypical low
5°CColdest in 20 years
19%Days with rain
Highs around 31°C and lows around 15°C, but it has dropped to 5°C. Rain on 19% of days.
NASA POWER data, 2006-2025, the week either side of race day
Organiser
Training
Training for the Night Crawler Endurance Challenge 12 hours
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Night Crawler Endurance Challenge 12 hours plan targets
Typical sessions
A sustained 12hr effort
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Night Crawler Endurance Challenge 12 hours plan.
7-day free trial, no card required.
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