Des Plaines River Trail Marathon

The Des Plaines River Trail Marathon is held annually in Lake County, Illinois, primarily utilizing the Des Plaines River Trail, a multi-use trail north of Chicago. Starting and finishing at Half Day Forest Preserve, the course follows an out-and-back format along the northern segment of the trail. The surface consists of fine crushed limestone, which remains flat, wide, and free of roots and rocks throughout the race. The course was re-certified in 2023 and is marked for easy navigation. Runner