Arrowhead Endurance Run

Arrowhead Endurance Run takes place in Johnston City, Illinois, on October 11, 2026. It is a trail event built around timed formats: a 24 Hour and a 24 Hour Relay, a 12-hour race and a 12 hour night-time race, a 6-hour and a 3 Hour Race, so you choose how long you want to be out rather than how far.

Timed events reward steady effort over speed. The 3-hour and 6-hour are gentle introductions to long running, letting a newer runner pass a half marathon or marathon for the first time without cutoff stress. The 12-hour formats, day or night, suit runners ready to attempt 50K or 50 miles, and the night option is a smart rehearsal for anyone with a 100-miler on the horizon. The 24 Hour, solo or as a relay team, is the full experience of running around the clock. Southern Illinois trails in October are usually mild and mostly runnable. Prepare with 14 to 20 weeks depending on your format, using long runs of three to five hours that mix running and walking, and practice eating every 30 to 45 minutes so that your stomach is trained as well as your legs.