The Next Loop Endurance Series • Cliff Cave

The Next Loop Series makes its debut in St. Louis with an endurance-focused trail race at Cliff Cave Park, offering both 40-mile and 50-mile continuous options alongside the standard loop-based format. This unique event challenges runners to tackle a scenic 3.1-mile course every hour until they decide to stop.
The looping route winds through diverse landscapes of wooded trails, rolling hills, and bluffside sections overlooking the Mississippi River, providing breathtaking views with each lap. Participants can choose their own pace and distance, making it an ideal setting for both casual runners looking for a fun challenge and serious athletes aiming for longer distances like 50K or even beyond.
Runners start fresh at the top of every hour, allowing them to rest and refuel before beginning another loop if they so desire. The course is marked clearly, ensuring that participants can focus on their endurance rather than navigation. Aid stations are strategically placed near the starting area for each lap, offering hydration and basic nutrition essentials.
The event's flexible structure means runners aren't locked into a specific goal; completing one or multiple loops is entirely up to them. Each loop contributes toward overall results, which are ranked by both the number of laps completed and total time spent running. This format eliminates pressure from strict cutoff times and penalties for not finishing—participants can stop at any point without affecting their official standings.
The inclusive atmosphere encourages all runners to push themselves within their comfort zones, fostering a supportive community where friends and family can cheer on participants between loops. With no fear of failure or missed deadlines, The Next Loop Series in St. Louis promises an unforgettable endurance adventure for trail running enthusiasts.
Join the first class of finishers at Cliff Cave Park this fall as you explore the scenic trails and test your limits against a backdrop of natural beauty.