F^3 Cap Sauers Trail Marathon & 10 Mile

Experience the thrill of the F^3 Cap Sauers Trail Marathon & 10 Mile on Saturday, May 9, 2026, in the picturesque Palos Hills, Cook County, Illinois. This premier trail running event welcomes athletes of all levels to conquer the scenic Cap Sauers Holding Nature Preserve, the largest undeveloped natural area in Cook County. Runners will navigate the well-maintained Sag Valley Trail system, featuring the Yellow, Green, Blue, and Tan trails, with over 1,000 feet of elevation gain that promises both challenge and reward. The wide horsetrail design ensures smooth two-way traffic and fosters a supportive community atmosphere as participants encourage one another. Whether competing in the full marathon or the 10-mile race, this event offers an unforgettable opportunity to embrace fitness, nature, and camaraderie amidst breathtaking landscapes. Join us for a memorable day of outdoor adventure and trail running excellence.