Trail Running calendar near Williams Bay 2026-2027

A flat, fast trail event at Half Day Forest Preserve offering Half Marathon, Marathon, 50K and 50 Mile distances on crushed gravel through forests and wetlands with aid stations, finisher medals and the Marathon as a Boston qualifier.

Join the Race For Open Space on Oct 11, 2026 in West Bend for a chip timed run and walk through forests, prairie and glacial moraine to benefit Cedar Lakes Conservation Foundation. Distances for all ages and awards for top finishers.

A seven-race trail series in Oconomowoc from April to October 2026 offering 5K, 10K, half-marathon, walking and ruck options, cupless events, age-group scoring and finisher Woodles.

Join the Jaimie Cox Memorial Run on October 17, 2026 in Roscoe, Illinois for a community 5K or 2 mile walk along the scenic Stone Bridge Trail. Family friendly with kids and virtual options, supporting the Jaimie Cox scholarship.

A 5k trail event in Pingree Grove, Illinois on October 23, 2026 where participants can run, walk, or ruck through a course with haunted sets, animatronics, and actors. The evening includes multiple heats plus a costume contest, bonfire, ent..

Trail ultraruns of 25K and 50K on a 5.5 mile loop at Red Gate Woods near Willow Springs. Mostly single track with staffed aid stations and a 5pm cutoff; no pacers allowed.

A trail race at The Forge in Lemont, IL on November 14, 2026 offering 10K, 20K, 30K and 60K on single and double track trails with variable surfaces, an aid station for multi-lap races, and a 400-runner cap.