KEYS100 Ultramarathon
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About the race
KEYS100 Ultramarathon is a 100-mile, point-to-point race across the Florida Keys, from Key Largo to Key West. It also offers a 50-mile option (Marathon to Key West) for individuals and teams, and a 50-kilometer race from Big Pine Key to Key West. All events finish at Higgs Beach on the Atlantic in Key West.
The course unfolds along a tropical island chain, with a festive finish zone under a large tent offering cooked food, drinks, and awards. Runners compete as individuals or in up-to-six-person relay teams; support crews leap-frog along approved meet-up locations since there are no formal aid stations. Marshals, medical staff, and law enforcement ensure safety; timing is provided by MCM Timing. Visit the organization's website for the most recent information.