In 260 days · Sat, May 15, 2027
Don't let race day sneak up
One email during race week. That's it.
Saturday, May 15th, 2027
Higgs Beach, Key West FL
Ultra
78–81°F · some rain risk
See last 10 years
On this date: rain 4 of the last 10 years
2026
78–82°F
dry
2025
79–82°F
dry
2024
82–84°F
dry
2023
75–80°F
dry
2022
75–82°F
dry
2021
76–81°F
rain
2020
75–78°F
rain
2019
74–82°F
rain
2018
74–80°F
rain
2017
76–80°F
dry
Best months to race in Florida →
About this race
Race Overview
Registration is open for the 19th Annual race across the islands of the Florida Keys--May 15-16, 2027.
- Location: Higgs Beach, Key West, FL
- Distance: Ultramarathon
- URL: KEYS100 Ultramarathon
- Date: May 15-16, 2027
Course Details
This chain of unique and inter-connected islands--some inhabited, some not--end in the City of Key West, just 90 miles from Cuba.
- Pavement Race: Approximately 75% run on paved bike paths and sidewalks.
- Other Surfaces: Portions run on parallel pedestrian bridges and parts of the old service road.
- Road Awareness: Balance is run on the road shoulder facing traffic--caution is paramount when running these sections.
- Scenic Beauty: Surrounded by the turquoise waters of the Atlantic Ocean and Florida Bay/Gulf of Mexico.
Experience the Florida Keys
The Florida Keys, known locally as "The Conch Republic", is a spectacular and laid-back sub-tropical paradise.
- Activities: Great fishing, kayaking, snorkeling, and diving.
- Accommodations: Hotels, resorts, B&B's, and cuisine to fit every budget.
- Culture: Unique culture, important history, and entertainment to fit every taste.
- Events: Special events throughout the year including KEYS100, and no passport required to visit!
Join Us!
So, what are you waiting for? We’ve saved a space for you!
Course map
Train with a club
Run clubs near Key West to train with before race day.
See all run clubs near Key West →Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.