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Iron Will Grand Slam

Enterprise, United States • 1 Jun 2025

The Iron Will Grand Slam is an ultimate ultra-running challenge held in Enterprise, Kansas, featuring four grueling 100-mile races throughout 2025. Participants tackle the Earth Day Buckle Mania, Iron Will Backroads, Honey Badger Road Race, and the Iron Will race, spanning from April to September. The courses include gravel roads and rail trails, with varying conditions such as summer heat.

For $600, runners gain entry to all four events, earning a unique finisher buckle at each race. An optional commemorative plaque is available to celebrate completing the series. This demanding series offers a rare opportunity to join an elite group of ultra runners. Visit the organization's website for the most recent information.

United States Kansas Enterprise

Race information

Registration Facebook
100 mi
Earth Day Buckle Mania 100 Miles
100 mi
Honey Badger Road Race 100 Miles
100 mi
Iron Will 100 Miles
100 mi
Iron Will Backroads 100 Miles
Visit the organization's website for the most recent information.
Trail runs nearby

Iron Will Backroads

Enterprise

This event in Enterprise, Kansas offers three distances on a unique course of gravel roads and a historic rail trail. The 100-mile route is run in laps. All finishers receive an award.

Iron Will 100 - Junction City, KS

Junction City

The Iron Will 100 in Kansas features ultra distances on a flat, shaded river trail. Choose from 100 miles, 50 miles, 50K, or a 36-hour format. All finishers earn a commemorative buckle.