Mammoth Cave 50K/25K

1 Mammoth Cave Parkway
Mammoth Cave, KY 42259

Running > Obstacle Race

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Event Description

Join us for the inaugural Mammoth Cave 50K/25K trail race on Saturday, October 23, 2021! This is the first organized ultra trail race to occur in the Park - you won't want to miss making history!

Named after the historic railroad that once roared through Mammoth Cave National Park from 1886 through 1931, the Bike & Hike Trail provides a scenic, wooded experience entirely within the Park on a crushed gravel surface. The trail offers some challenging ascents/descents along its 9-mile crushed stone route, and is perfect for the first-time trail runner or racers looking to set a lightening fast PR!

The 50K race will start at 7:00 AM with the 25K race at 8:00 AM. The race is an out-and-back with the 50K runners repeating the route.

Due to National Park restrictions, this event is capped at 75 runners. We will open the initial registration to 50 entries for the 50K and 25 entries for the 25K. Based on demand, we may open additional spots in the 50K distance by eliminating open spots in the 25K, or vice versa and adjust as needed. 

With the cap of 75 runners, we expect this event to sell out quickly!

This will be a "cupless" race. Runners will need to provide their own collapsible cups, bottles or hydration packs for refill at the aid stations.

The appropriate COVID precautions & safeguards will be enforced based on CDC guidelines at time of the event.

For lodging options within the Park, please visit Camping reservations are available at

Donations are being accepted for Friends of Mammoth Cave (click on the "Donations" button above for for info)


Event Location & Accomodations

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