How hilly is the KEYS100 Ultramarathon (Key Largo to Key West)?
The KEYS100 Ultramarathon (Key Largo to Key West) is described as pancake flat.
KEYS100 Ultramarathon (Key Largo to Key West) Ultramarathon
This race edition
- Race date
- Date not confirmed for this distance
- Race timezone
- Timezone not confirmed
- Edition status
- Status not confirmed
Entry options
2027 edition
Entry options are not yet confirmed for this edition. Check the organiser before making plans.
Official event website & entry ↗Data current as of
Decision summary
KEYS100 Ultramarathon (Key Largo to Key West) Ultramarathon at a glance
- Cut-off average pace
- 11:56/km
- Typical conditions
- 14/100
- Evidence depth
- 49 verified facts
32:00:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.
Historical race-date favourability, not a forecast
Source facts available
Route details
Known course facts at a glance
KEYS100 Ultramarathon (Key Largo to Key West) Ultramarathon has known course details for its ultramarathon race. The summary below keeps the focus on what is confirmed for the course.
- Official distance
- 160.9 km
- Terrain
- Road, Mixed
- Scenery
- Coastal, Waterfront, Island
Quick answers
What runners ask first
Where does the KEYS100 Ultramarathon (Key Largo to Key West) route go?
The KEYS100 Ultramarathon (Key Largo to Key West) route starts at 100-mile: Key Largo Community Park, Key Largo (5:30am Saturday). 50-mile: Marathon Garden Club, Marathon. 50K: Lower Keys Chamber of Commerce property, Big Pine Key (noon) and finishes at Higgs Beach, Key West, on the Atlantic Ocean (all distances finish here). Underfoot, expect pavement. It passes Overseas Highway (US Highway 1), Seven Mile Bridge, Long Key Bridge, Key Largo and Islamorada. Crosses 40-plus bridges across roughly 30 islands, including the iconic Seven Mile Bridge, with crystal-clear ocean views the entire way.
What should runners know on race day for the KEYS100 Ultramarathon (Key Largo to Key West)?
0.
Race character
Scenery
- Coastal
- Waterfront
- Island
Atmosphere
- Destination
- Scenic Tour
- Nighttime
Terrain
- Road
- Mixed
- Elevation character
- Pancake Flat
- Technicality
- Non Technical
Entry, logistics and records
Records and field
- Men's course record
- 13:20:18 (Brett Sanborn)
- Women's course record
- 14:42:45 (Alyson Venti)
- Field size
- Field limits (2026): 100-mile individual 250 runners; 50-mile individual 100 runners; 50K individual 100 runners. A waiting list opens when an event sells out.
- Field cap
- 250
Entry requirements
- Entry status
- Open entry: The held registration model is open entry and this edition is not marked sold out.
- Minimum age
- 17+
- Cut-off
- 100-milers have 32 hours from when their wave crosses the start line; 50-milers have 20 hours; 50K runners have 12 hours.
- Qualification status
- Open Entry ultra with no qualifying standard; entry is not a qualifier for other races.
Race day logistics
- Aid stations
- 0
- Race village
- No
- Medal
- In-person awards ceremony held under a tent at the Higgs Beach finish.
Access and course status
- Start
- 100-mile: Key Largo Community Park, Key Largo (5:30am Saturday). 50-mile: Marathon Garden Club, Marathon. 50K: Lower Keys Chamber of Commerce property, Big Pine Key (noon).
- Finish
- Higgs Beach, Key West, on the Atlantic Ocean (all distances finish here).
Course facts
- Course type
- Point To Point
- Surface
- Pavement
- Landmarks
- Overseas Highway (US Highway 1), Seven Mile Bridge, Long Key Bridge, Key Largo, Islamorada, Marathon, Big Pine Key, Atlantic Ocean, Florida Bay, Gulf of Mexico, Higgs Beach, Key West
- Notable features
- Crosses 40-plus bridges across roughly 30 islands, including the iconic Seven Mile Bridge, with crystal-clear ocean views the entire way. A crew-supported race with NO aid stations or water stops
- each runner must provide a personal support crew. Intense heat and humidity are defining challenges. Created by Bob Becker to echo the heat and pavement of Badwater 135
- There are no aid stations or water stops along the route
- runners must be self-sufficient with their own support crew (two runners may share one crew if running together throughout)
What are typical race-day conditions?
- 26°CTypical temperature
- 27 kphTypical wind
- 4 mmTypical rainfall
- 14Favourability /100