The Inferno Challenge

JUL
18
2026
Test your endurance at Harns Marsh in Lehigh Acres with flat and fast races through the Florida summer sun. Choose between 5K, 12K, or 25K distances and earn a custom finisher medal.
Sat 18 Jul 2026
25 kilometers 12 kilometers 5 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

The Inferno Challenge

The Inferno Challenge is a summer running event held at Harns Marsh in Lehigh Acres, Florida. Taking place on Saturday, July 18, 2026, this event offers three distinct distances through sun-exposed terrain in Lee County.

Participants can choose from three event distances:

  • 5K
  • 12K
  • 25K

The course is characterized as flat and fast. While the 5K is open to a general audience, the 12K and 25K are specifically aimed at endurance athletes due to the summer conditions. All participants are subject to a strict course cut-off at 12:00 PM.

Registered runners receive an Inferno T-shirt and a custom finisher medal upon completion of their race. Awards are also presented to the top overall finishers and age group winners. A designated packet pickup takes place the day before the race at Fleet Feet Fort Myers. The organizers recommend that participants prepare for the environment by dressing in light clothing, hydrating early, and applying sunscreen. Visit the organization's website for the most recent information.

25 km
25k
12 km
12k
5 km