Arctic Frog Run - Libertyville, IL

The Summer Trail Classic is a trail running event held at Paul Douglas Forest Preserve in Hoffman Estates, Illinois. It offers three race distances: approximately 4 miles, 9.5 miles, and 13 miles, providing a true trail running experience on twisting single-track trails. The event is part of the 202..

Dirt Circus - Chicago is a free community running event held in Crystal Lake, Illinois, celebrating local trail running culture. Organized by UltraSignup, the event features a festive atmosphere with a social run, food, raffle prizes, and an expo showcasing local races, run clubs, brands, and busine..

Half Day at the Lake is a unique ultra-running event held in Evanston, Illinois, featuring 6- and 12-hour race options. The race takes place on a scenic 2-mile loop along Chicago’s north shore lakefront path, passing through Evanston’s lakefront and Northwestern University’s campus. The course is a..

The Des Plaines River Trail Races, held in Lake County, Illinois, offer a scenic and fast trail running experience with distances including a Half Marathon, Marathon (Boston Qualifier), 50K, and 50 Mile ultra. Starting and finishing at Half Day Forest Preserve, the course features a flat, wide, crus..

Soul Crusher is a trail-running event in Crystal Lake, Illinois, offering 5- and 10-mile options. Runners navigate single-track forest trails through Veteran Acres and Sternes Woods, with a course described as challenging, fun, and bone-decorated. The start line sits in the middle of the park at a s..

The Fast Track Cross Country Open is a 3.05-mile race held in Schaumburg, Illinois, on the MacNider cross country course near Hoover Elementary School. Scheduled for November 9, 2025, it features separate women's and men's races open to all ages and abilities. The course consists of a short start fo..