A 100-Mile Ultra Marathon that focuses on connecting the power of human spirit to the wildest aspects of elemental nature.

Indomitus literally translated, means "Untamed".
This is the spirit of the Indomitus 100!
A race that creates a connection between YOU and the toughest elements of nature.
As such, the Indomitus 100 is never run in the same place twice; rather, following the seasons, elements and forces of nature.
20 Miles out and back!
30 hour cutoff

Upcoming Races

Jul 17 2020
100 Miles
Out and Back Course
2 Elevation Rating
Rolling, ~2500 feet in 50 miles
2 Surface Rating
Mostly groomed trail or dirt roads


No Past Races
We try to keep the most accurate information about this race, but changes do happen. Always visit the official race website for the most up to date information.
Earth Day 50K
  • Apr 18, 2020
  • Crystal Lake, IL
50 KM