The Inferno Challenge Harns Marsh
- Date
- July 18, 2026
- Distance
- 5K · 12k · 25K
From the Organizer
🔥 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:
25K:
Dress light, hydrate early, and bring your sunscreen!
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
91°
Typical Low
75°
Chance of Rain
63%
Based on US Climate Normals data from Ft Myers Sw Fl Rgnl Ap, 7 mi from the venue.
Host City
About Lehigh Acres, FL
Elevation
26 ft
Nearest Airport
RSW
Southwest Florida International Airport · 7 mi
Time Zone
Eastern Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at The Inferno Challenge Harns Marsh, put it on the calendar, and turn “someday” into a start date.
40
Days to train
- Race
- The Inferno Challenge Harns Marsh
- Date
- July 18, 2026
Coming Up
More Running races near Lehigh Acres, FL
Fort Myers track Club membership fun run
12 miles away
Snow Bird Classic - America 250 Challenge
12 miles away
Snow Bird Classic - Tropical Thunder
12 miles away
Tunnel to Towers 5K Run & Walk - Fort Myers, FL
5K
12 miles away
From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is The Inferno Challenge Harns Marsh?
- The Inferno Challenge Harns Marsh is a running race held in Lehigh Acres, Florida on July 18, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is The Inferno Challenge Harns Marsh?
- Saturday, July 18, 2026 in Lehigh Acres, Florida at 3399 38th Street W, Lehigh Acres, FL. Check the event page for exact start times and wave schedules.
- How do I register for The Inferno Challenge Harns Marsh?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
The Inferno Challenge Harns Marsh
Jul 18, 2026