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34,045EventsUnited States2026
This week
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F^3 Cap Sauers Trail Marathon & 10 Mile
Saturday, May 9, 2026 · Palos Hills, United States
Distances
16.1km
Full
Start location
About this race
The Cap Sauers Holding Nature Preserve, the largest tract of undeveloped land in Cook County, IL, hosts this race covering every inch of maintained trail. With over 1000 ft of elevation, this marathon is mountainous by Chicago standards. Runners will navigate the Sag Valley Trail system, traversing the Yellow, Green, Blue & Tan trails. A wide horsetrail runs throughout, suitable for 2-way traffic and participant encouragement at the F^3 Cap Sauers Trail.