Races Half marathon · Key West, USA
Key West Half Marathon
Key West Half Marathon is a flat half marathon in Key West, USA, held each January. A flat course at sea level. It runs through Old Town and along the Atlantic side of the island. Wind and humidity are the main challenges. Warm and humid in January, with race-morning temperatures of about 16 to 25°C. The Key West Half Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Page rebuilt 2026-11-14 · race facts not independently verified — confirm dates and entries on the official race site
When
January
every year
Course
flat
Half marathon
Conditions
Warm and humid in January, with race-morning temperatures of about 16 to 25°C.
Racing this course well
A flat course at sea level. It runs through Old Town and along the Atlantic side of the island. Wind and humidity are the main challenges.
The Key West Half Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Getting a place
- How you get in
- Open entry: first come, first served
Official Key West Half Marathon site →Checked November 2026
Race day
- Start time
- 07:00
- Also on the day
- 10k, 8k, 5k
Worth knowing
- The race weekend is held on Martin Luther King Jr. weekend each January.
Pick your goal for Key West
Pace charts, weekly structure and timelines for the most common half marathon goals:
We don’t hold a confirmed date for this edition, so any countdown comes from the date you enter here.
Build your training around Key West Half Marathon.
RunV works backwards from race day to today. Your plan adapts when life interrupts, and you approve every change. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Key West Half Marathon?
- It is held each January in Key West, USA. Check the official Key West Half Marathon site for the exact date and entry windows.
- Is the Key West Half Marathon course flat?
- A flat course at sea level. It runs through Old Town and along the Atlantic side of the island. Wind and humidity are the main challenges.
- How do I enter the Key West Half Marathon?
- Open entry: first come, first served.
- How should I train for the Key West Half Marathon?
- Build for the course you'll actually race at the Key West Half Marathon: flat terrain, January conditions. RunV Premium builds a training plan around your goal time and race date, and lets you adapt it when life interrupts the Key West build.
Not sure what to target? Predict your half marathon time from a recent race →
More half marathon races
Supplements research for this distance
Build for Key West — around your actual life
RunV engineers your block backwards from race day in January — and adapts it when training doesn't go to script. You approve every change.
