The Inferno Challenge Harns Marsh
About this race
🔥 The Inferno 5K, 12K & 25K 🔥
Can You Beat the Heat?
Get ready to turn up the heat at one of the hottest races of the summer!
The Inferno 5K, 12K and 25K is coming to Harns Marsh in Lehigh Acres, FL on again Saturday, Saturday July 18th, 2026 — and we’re daring you to take on the sun, the sweat, and the Florida fire! The 5K is for everyone but the 12K and 25K are designed for endurance athletes and heat-hardened runners, this race pushes limits with gritty summer miles through Florida's sun-soaked terrain. This is your chance to prove you can go the distance — and handle the heat.
Race Day Details:
📍 Location: Harns Marsh, Lehigh Acres (Lee County, FL)
🕢 Start Time: 7:30 AM
🏃♂️ Distance: 5K,12K or 25K
🔥 Terrain: Flat and fast — but the real challenge is the heat and the sun!
🕢 Cut Off Time: 12:00 PM (All races) - No Exceptions!
Race Swag:
Custom finisher medal for all participants
Inferno T Shirt
Awards for top overall and age group finishers
Packet Pickup:
📍 Fleet Feet Fort Myers
🗓 Friday, July 17th 2026
🕔 5:00 PM – 7:00 PM
5K Course:
Click HERE!
25K:
Click HERE!
Dress light, hydrate early, and bring your sunscreen!
Pick your distance
Running
5K
12k
25K
Typical race-day weather
Based on 2 years of historical conditions on this event's race dates in Lehigh Acres.
Course
Route map and elevation profile
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
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Other races near Lehigh Acres
Different organizers, within 40 miles, in the next three months
Lcso Benefit Ride
Hero Hustle-
Fitmix Fest Color Run 5K -
Ghost of the Coast Fun Run
🏃 Plan Your Next Race in Lehigh Acres
Find upcoming events by distance:
- Lehigh Acres 5K Races 3 races
- Lehigh Acres Running Calendar 2026 4 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 4 Lehigh Acres events
Spotted something wrong? Tell us and we'll fix it.