Intermediate 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 point-to-point course along the scenic Hennepin Canal from Sterling to Colona, featuring historic locks, lift bridges, and autumn farmland views

Flat, fast crushed limestone trail winding through forests and wetlands with bridges, minimal road crossings, and occasional water from flooding

Grassy paths, dirt single track, creek crossing, and demanding hills on private land between Fox Ridge State Park and Warbler Ridge in Charleston, IL

Scenic Tunnel Hill State Trail course with gentle grades, wooden trestles, rock formations, wetlands, and historic railroad features

Reverse 10-mile loop in McNaughton Park: winding singletrack, rugged footing, two creek crossings and about 1,300 feet of gain per loop

Scenic loops through Lemont Quarries and I&M Canal on forested trails, gravel paths, and technical single-track with short, steep inclines and varied surfaces

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

Rugged forest trails along the Mississippi River, challenging terrain, multiple distance options, and scenic views inside Loud Thunder Forest Preserve

Lap-based ultra in Deer Grove Forest Preserve West, with a mostly wide, non-technical course and a single aid station every 5.5 miles.