Skip to main content

KEYS100 Ultramarathon

Sat May 16 - Sun May 17, 2026 Key West, FL 33340 US

100 Mile Individual Ultra

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.
Open to ages 18 - 90.
Event Dates:
Saturday May 16, 2026 - Sunday May 17, 2026
Start Time:
5:30am EDT
End Time:
3:30pm EDT
Registration Limit:
170 spots left.
Price:
$335.00 Race Fee + $17.75 SignUp Fee
Registration:
Price increases to $375.00 after January 10, 2026 at 11:59pm EST

50 Mile Individual Ultra

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.
Open to ages 18 - 90.
Event Dates:
Saturday May 16, 2026 - Sunday May 17, 2026
Start Time:
9:00am EDT
End Time:
5:00am EDT
Registration Limit:
141 spots left.
Price:
$285.00 Race Fee + $15.25 SignUp Fee
Registration:
Price increases to $305.00 after January 10, 2026 at 11:59pm EST

50 Kilometer Individual Ultra

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.
Open to ages 16 - 90.
Event Dates:
Saturday May 16, 2026 - Sunday May 17, 2026
Start Time:
12:00pm EDT
End Time:
12:00am EDT
Registration Limit:
149 spots left.
Price:
$230.00 Race Fee + $14.80 SignUp Fee
Registration:
Price increases to $260.00 after January 10, 2026 at 11:59pm EST

100 Mile Team Relay

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.
Open to ages 15 - 90.
Event Dates:
Saturday May 16, 2026 - Sunday May 17, 2026
Start Time:
5:00am EDT
End Time:
3:30pm EDT
Price:
$990.00 Race Fee + $50.50 SignUp Fee
Registration:
Price increases to $1,050.00 after January 10, 2026 at 11:59pm EST

50 Mile Team Relay

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.
Open to ages 16 - 90.
Event Dates:
Saturday May 16, 2026 - Sunday May 17, 2026
Start Time:
9:00am EDT
End Time:
5:00am EDT
Price:
$495.00 Race Fee + $25.75 SignUp Fee
Registration:
Price increases to $525.00 after January 10, 2026 at 11:59pm EST

If you continue to use this site, you consent to use all cookies. We use cookies to offer you a better browsing experience. Read how we use cookies and how you can control them by visiting our Privacy Policy.

If you continue to use this site, you consent to use all cookies.