November ultramarathons in Illinois, United States

Wooded, unpaved trails through the Palos/Sag Valley Trail Systems in the Cook County Forest Preserve

Mostly flat, fast looped course on local trails and roads, with a ravine climb midway through each lap and a community-driven atmosphere.

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