KEYS100 Ultramarathon
About this race
Registration is open for the 18th Annual race across the islands of the Florida Keys--May 16-17, 2026. This chain of unique and inter-connected islands--some inhabited, some not--end in the City of Key West, just 90 miles from Cuba. This is a pavement race, with approximately 75% run on paved bike paths or sidewalks and the balance on the road shoulder facing traffic. The Florida Keys, known locally as "The Conch Republic", is a spectacular and laid-back sub-tropical paradise, surrounded by the turquoise waters of the Atlantic Ocean and Florida Bay/Gulf of Mexico. The Keys feature great fishing, kayaking, snorkeling and diving, hotels, resorts, B&B's and cuisine and cocktails to fit every budget. There is entertainment to fit every taste, important history and a unique culture, sunsets that will keep you spellbound, special events going on throughout the year including KEYS100, of course, and you don't need a passport to visit here! So, what are you waiting for? We've saved a space for you!
Join fellow runners on May 18, 2019 for the KEYS100 Ultramarathon. It's a fantastic Ultra featuring a flat and fast course in Key West.
Pick your distance
Running
100 Mile Individual Ultra
Point-to-point running race from the Divers Direct and Office Depot shopping center in Key Largo to Key West along the "Florida Keys Overseas Heritage Trail" and Overseas Highway (US #1). Fully stocked aid stations and un-staffed water stops approximately every 5 miles supporting the individual runners. Race with or without your own support crew. Party and recover under the big tent at the finish line on Higgs Beach in Key West. KEYS100 is sanctioned by USA Track & Field.
50 Mile Individual Ultra
Point-to-point running race from Marathon Garden Club at Mile Marker 50 in the City of Marathon to Key West along the "Florida Keys Overseas Heritage Trail" and Overseas Highway (US #1). Fully stocked aid stations and un-staffed water stops approximately every 5 miles supporting the individual runners. Race with or without your own support crew. Party and recover under the big tent at the finish line on Higgs Beach in Key West. KEYS100 is sanctioned by USA Track & Field.
50 Kilometer Individual Ultra
Point-to-point running race from Big Pine Key (near Mile Marker 31) to Key West along the "Florida Keys Overseas Heritage Trail" and Overseas Highway (US #1). Fully stocked aid stations and un-staffed water stops approximately every 5 miles supporting the individual runners. Race with or without your own support crew. Party and recover under the big tent at the finish line on Higgs Beach in Key West. KEYS100 is sanctioned by USA Track & Field.
100 Mile Team Relay
Point-to-point running race from the Divers Direct and Office Depot shopping center in Key Largo to Key West along the "Florida Keys Overseas Heritage Trail" and Overseas Highway (US #1). Separate military team competition, too. Teams decide their own strategy: runners do not have to run the same number of miles or "legs". Teams are self-sufficient, carrying their own food, water, ice, etc. Party and recover under the big tent at the finish line on Higgs Beach in Key West. KEYS100 is sanctioned by USA Track & Field.
Weather Overview
These values reflect historical conditions on the race dates in Key West in 2019, from Open-Meteo archive data.
About Key West
KEYS100 Ultramarathon takes place in Key West, Florida, United States. The local timezone is America/New_York.
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Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.
Nearby Events
Way Gay 5K
Rotary Club of Key West 4th of July 5K
Hemingway 5K Sunset Run
Parrots and Margaritas 5K Run/Walk
Way Gay 5K
Rotary Club of Key West 4th of July 5K
Hemingway 5K Sunset Run