1 event in Cook County, Illinois

From big races to Saturday morning group runs—find marathon events and connect with the local endurance sports community.

• F^3 Cap Sauers Trail Marathon & 10 Mile [f3running.com] [Register at runsignup.com]
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  Sat, May 09, 2026 at 7:30 AM

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  Explore the Cap Sauers Holding Nature Preserve - the largest tract of undeveloped land in Cook County, IL. This race will cover every inch of maintained trail within the Nature Preserve. With over...

  Explore the Cap Sauers Holding Nature Preserve - the largest tract of undeveloped land in Cook County, IL. This race will cover every inch of maintained trail within the Nature Preserve. With over 1000 ft of elevation, this marathon is mountainous by Chicago standards!

  The course uses the Sag Valley Trail system, covering the Yellow, Green, Blue & Tan trails. The whole course is wide horsetrail, allowing for 2-way traffic and encouragement from fellow participants.

  Results here: https://www.athlinks.com/event/353493/results/Event/1082897/Results

  Photos here: https://www.highfivebb.com/Running/F3-Cap-Sauers-Trail-Marathon-10-Mile-May-10-2025

  10 Miles 26.2 Miles Marathon Run Trail

  11200 S Willow Springs Rd, Cook County, Illinois, 60465, United States
  OpenStreetMap Google Maps

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