1 aidTrail Races & Ultramarathons in Illinois
As of October 6, 2026, Crewable lists 29 upcoming trail races and ultramarathons in Illinois from October 2026 to August 2027. The next is Arrowhead Endurance Run on October 10 in Johnston City. Registration is open for 5.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
With aid station data
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1 aidRace calendar
October 2026
9 racesNovember 2026
5 racesDecember 2026
2 racesJanuary 2027
1 raceMarch 2027
3 racesSkunkApe 806/524/314 Trail Race
Dixon, IL
April 2027
4 racesMay 2027
1 raceJune 2027
1 raceJuly 2027
1 raceAugust 2027
2 racesQuick answers
What is the next trail race or ultramarathon in Illinois?
Arrowhead Endurance Run, on Saturday, October 10, 2026, in Johnston City. Distances: 12 hr, 3 hr, 2.07 mi.
How many trail races and ultramarathons in Illinois have open registration?
5 of the 29 list registration as open as of October 6, 2026, including Soul Crusher, Haunted Highlander Assault Trail Run and Allerton Park Trail Run.
How many of the trail races in Illinois are ultramarathons?
21 of the 29 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 8 are shorter races.
What is the busiest month for trail races and ultramarathons in Illinois?
October 2026, with 9 of the 29. November 2026 follows with 5.
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