Hard ultramarathons in Illinois, United States

Scenic Illinois River trails with 100 mile, 100k, and 50k options; roughly 23,500 feet of elevation gain and rustic woodland terrain at Camp Wokanda

Looped course through Shawnee National Forest featuring 80% single-track dirt, creek crossings, rocky terrain, waterfalls, and 3200 ft elevation per loop.

Multi-loop ultramarathon offering official finishes and awards at 50K, 100K, 150K, or 200K; progressive distances with tiered medallion and buckle rewards

7.85-mile loop from Meadows Park with singletrack, grassy meadows, and gravel; moderate elevation gain totaling 6,200 feet over the 100-mile distance

Flat, fast 113-mile and 56-mile road ultra along the Mississippi, with pavement, gravel, levees, backroads, and historic river landmarks.

Multiple ultra distances on a 10-mile single-track loop with rolling hills, prairie, creek crossings, 1,600 feet elevation gain per loop, and frequent aid stops