
About the event
Experience the KEYS100 Ultramarathon’s 50-kilometer race on May 17, 2025, a shorter but equally stunning journey through the Florida Keys. Starting in Big Pine Key, participants run along the Overseas Highway to the finish line in Key West. Organized by Ultra Sports, LLC, the event offers a 12-hour time limit and staggered starts beginning at 12:00 PM. It’s a perfect introduction to ultramarathon running in an unforgettable coastal setting.
Date:
Sat
May 17
2025
Location:
Distance:
Elevation profile:
Rolling
Website:
LinkElevation gain:
Number of participants:
Find the best training plan for your goals and the distance you’re planning to run:
Stories from Runnas
The KEYS100 Ultramarathon’s 50-kilometer race on May 17, 2025, runs from Big Pine Key to Key West along the scenic Overseas Highway. Organized by Ultra Sports, LLC, this race has a 12-hour cutoff, starting at 12:00 PM.
If you are an official race organiser with any questions about this page, please get in touch: races@runna.com
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