• Other-24 Miles - Individual Adult (13+)
  • Other-24 Miles - Group-registration Team Adult (13+)
  • Other-24 Miles - Individual Youth (12 and under)



About The Mammoth-on

Mammoth-on: America’s only cave, hike, and bike triathlon. This fun, family-friendly event grows larger every year! Challenge yourself or just have fun with friends and family as you Cave, Hike, and Bike one of the most unique Triathlons in the world.

Optional Activities:

  • Walk the Historic Tour route inside Mammoth Cave.

  • Hike two miles on a beautiful, woodland trail.

  • Ride a bike along the Mammoth Cave Railroad Bike and Hike Trail to Park City.

The Mammoth-on begins at the check-in tent in front of the Mammoth Cave Lodge. Enjoy a ranger-led hike into Mammoth Cave along the Historic Trail. Upon leaving the cave, participants will proceed to the nearby trail (marked with flags) to hike two miles. Lastly, participants ride a bike on the Mammoth Cave Railroad Bike and Hike Trail, which is about twenty miles round trip to the Grand Victorian Inn in Park City and back. Not quite ready to pedal twenty miles? Ride half as far as you feel works for you, and turn around. Want to ride further than twenty miles? Alternate mixed-surface route is available.

Friends of Mammoth Cave will provide water stations along the way at Sloans Pond, Diamond Caverns and Bells Tavern Park. 

Please note, this is not a race, but a fun, family-friendly event. Helmets are recommended for the bike ride. Bikes and hiking gear not provided. Bikes and hiking gear not provided. Registration is free for participants under 12 years of age with a parent or guardian registration. T-shirt included with paid Adult Registrations only.

Event details and schedule

Event details and schedule

  • 7:30 am: Packet pick-up and on-site registration begins

  • 8:15 am: Safety briefing (required before entering Mammoth Cave)

  • 8:30 am: Ranger-led hike on the historic route inside Mammoth Cave

  • 9:00 am (approximate): Group exits the cave; hikers continue at their own on the 2.3-mile woodland trail.

  • 9:30 am (approximate): Hikers return to registration area, continue on their own bikes toward Park City (20 miles round-trip). 

  • 2:00 pm: Route sweepers close the course

Organised by

Friends of Mammoth Cave National Park, Inc.

P.O. Box 2, Mammoth Cave

Phone: 270-758-2152

Event Images