Upcoming Ultramarathons in Illinois

Endurance Grid lists 4 ultramarathons in Illinois, from August to September 2026 across 4 cities.

4
Races
4
Cities

The lay of the land

Ultramarathon Races in Illinois

The ultramarathon race calendar in Illinois is busiest in August and September.

What an ultramarathon is

An ultramarathon is any running race longer than 26.2 miles. The most common distances are the 50K, 50-mile, 100K, and 100-mile — alongside timed events, where you cover as much ground as you can in a fixed window like 6, 12, or 24 hours.

Many ultras run on trails, with aid stations stocked with food, water, and posted cutoff times. For most entrants the goal is to finish, not to race the clock, and hiking the climbs is a normal part of the day.

Frequently Asked Questions (FAQs)

How many ultramarathons are in Illinois?+
Endurance Grid's Race Calendar lists 4 upcoming ultramarathons in Illinois across 4 cities, from August to September 2026.
What ultramarathon distances are offered in Illinois?+
Ultramarathons in Illinois include 1 Mile, 100 Mile, 100K, 4 Mile, 50 Mile, 50K, and Half Marathon distances.
When is ultramarathon season in Illinois?+
Ultramarathon season in Illinois runs spring through fall. Of the upcoming ultramarathons on Endurance Grid's Race Calendar, the most are in August and September.
Which Illinois cities have ultramarathons?+
Ultramarathons in Illinois are held in Edwardsville, Goreville, Ozark, and Vernon Hills.

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