50 milesCompletedEverfurther Events75 spots
The Next Loop 40M/50M Challenge | Cliff Cave
St Louis, Missouri
$125
Endurance Series – Late (after Aug 14)
1
Aid Stations
About This Race
The Next Loop at Cliff Cave Park is a trail endurance event in St. Louis, MO offering three race formats on a scenic 3.1-mile River Bluff Trail loop: a flexible hourly Endurance Series (5K–50K), a continuous 40 Mile Challenge, and a continuous 50 Mile Challenge, all with a 12-hour time limit and centralized aid station access every lap.
Key Dates
Registration Closes
Invalid Date
Race Day
Aug 22, 2026
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Pricing
Current Price
$125
Endurance Series – Late (after Aug 14)
Price Progression
The Next Loop 40-mile – Late (after Jul 31)
$125Aug 1, 2026
The Next Loop 50-mile – Late (after Jul 31)
$125Aug 1, 2026
Endurance Series – Late (after Aug 14)
$125Aug 15, 2026
The Next Loop 40-mile – Early
$100
Endurance Series – Early
$100
The Next Loop 50-mile – Early
$100
Aid Stations
1| Station | Distance | Crew | Drop Bags | Cutoff | Supplies |
|---|---|---|---|---|---|
Central Start/Finish Aid Station Fully stocked central aid station available before the start of every hourly loop and after every 3.1-mile lap. Runners have access to personal gear staging, crew support, and medical coverage at this location every loop. | 3.10 miles | -- | -- |
Race Planning
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