KEYS100 Ultramarathon
- Date Sat 16th May 2026 - Sun 17th May 2026
- Time 5:00AM EDT
- Location Key West, Florida
- Price $244.80 - $1,040.50
- Races 5 races
- Distances Ultra
Event summary
Get ready to lace up your running shoes for the 18th Annual KEYS100 Ultramarathon, taking place from May 16-17, 2026, in the stunning locale of Key West, Monroe. This exciting race invites participants to traverse the breathtaking islands of the Florida Keys, a tropical paradise known for its vibrant culture and stunning natural beauty. Runners can choose from various race distances, with approximately 75% of the course taking place on paved bike paths and sidewalks, ensuring a smooth and enjoyable experience.
The Florida Keys, affectionately known as "The Conch Republic," offer a unique backdrop with its turquoise waters, lively atmosphere, and rich history. As you race towards the finish line, you'll be surrounded by the charm of this sub-tropical haven, where fishing, kayaking, snorkeling, and delicious cuisine await. With captivating sunsets and a friendly community, the KEYS100 Ultramarathon promises not just a race, but an unforgettable adventure. Don’t miss this opportunity to be part of a spectacular event in one of the most beautiful destinations in the world—register today and secure your spot in this remarkable celebration of running and island life!
The Florida Keys, affectionately known as "The Conch Republic," offer a unique backdrop with its turquoise waters, lively atmosphere, and rich history. As you race towards the finish line, you'll be surrounded by the charm of this sub-tropical haven, where fishing, kayaking, snorkeling, and delicious cuisine await. With captivating sunsets and a friendly community, the KEYS100 Ultramarathon promises not just a race, but an unforgettable adventure. Don’t miss this opportunity to be part of a spectacular event in one of the most beautiful destinations in the world—register today and secure your spot in this remarkable celebration of running and island life!
Organiser's Description
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!
Races
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100 Mile Individual Ultra
Incl. $17.75 Fee & T-Shirt
Sat 16th May 2026 (5:30AM EDT)
$352.75
Point-to-point running race from Key West Community Park in Key Largo to Key West along the "Florida Keys Overseas Heritage Trail"--Overseas Highway (US #1). 100-milers have 32 hours from the time their wave crosses the start line to complete the race. Each runner MUST have a support crew, but may share a crew with one additional runner who MUST stay within the distance of one published meet-up location of the crew at all times. Runners are self-sufficient; there are no aid stations along the route. -
50 Mile Individual Ultra
Incl. $15.25 Fee & T-Shirt
Sat 16th May 2026 (9:00AM EDT)
$300.25
The 50-mile race is a point-to-point running race from the Marathon Garden Club in Marathon to Key West along the "Florida Keys Overseas Heritage Trail"--Overseas Highway (US #1). 50-milers have 20 hours to complete the race from the time their wave crosses the start line. Each runner MUST have a support crew, but may share a crew with one additional runner who MUST stay within the distance of one published meet-up location of the crew at all times. Runners are self-sufficient; there are no aid stations along the route. -
50 Kilometer Individual Ultra
Incl. $14.80 Fee & T-Shirt
Sat 16th May 2026 (12:00PM EDT)
$244.80
The 50-kilometer race is a point-to-point running race from the Lower Keys Chamber of Commerce property in Big Pine Key to Key West along the "Florida Keys Overseas Heritage Trail"--Overseas Highway (US #1). 50-K runners have 12 hours to complete the course from the time their wave crosses the start line. Each runner MUST have a support crew, but may share a crew with one additional runner who MUST stay within the distance of one published meet-up location of the crew at all times. Runners are self-sufficient; there are no aid stations along the route. -
100 Mile Team Relay
Incl. $50.50 Fee & T-Shirt
Sat 16th May 2026 (5:00AM EDT)
$1,040.50
Point-to-point running race from Key Largo Community Park in Key Largo to Key West along the "Florida Keys Overseas Heritage Trail"--Overseas Highway (US #1). 100-mile teams have 32 hours to complete the race from the time their first runner crosses the start line. Teams of up to six runners decide their own strategy: runners do not have to run the same number of miles or "legs", nor run in order. Teams are self-sufficient, carrying their own food, water, ice, etc. -
50 Mile Team Relay
Incl. $25.75 Fee & T-Shirt
Sat 16th May 2026 (9:00AM EDT)
$520.75
Point-to-point running race from the Marathon Garden Club in Marathon to Key West along the "Florida Keys Overseas Heritage Trail"--Overseas Highway (US #1). 50-mile teams have 20 hours to complete the race from the time their first runner crosses the start line. Teams of up to three runners decide their own strategy: runners do not have to run the same number of miles or "legs", nor run in order. Teams are self-sufficient, carrying their own food, water, ice, etc.
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