F^3 Cap Sauers Trail Marathon & 10 Mile
Sat, May 9, 2026, 7:30 AM CDT
- Location
- Palos Hills, IL
- 11200 S Willow Springs Rd, 60465
- Type
- TRAIL
Sign up and verify details on the organizer’s official page.
At a glance
Experience a challenging trail marathon through the expansive, undeveloped Cap Sauers Holding Nature Preserve, featuring significant elevation gains.
- Scenic
ScenicDiscover the F^3 Cap Sauers Trail Marathon, an immersive journey through the Cap Sauers Holding Nature Preserve in Palos Hills, IL. This event covers every maintained trail within Cook County's largest undeveloped land tract. Runners will navigate a wide horsetrail course with over 1000 feet of elevation, a significant climb by Chicago standards. The Sag Valley Trail system offers a unique trail experience, allowing for two-way traffic and supportive interactions with fellow participants.
What to expect
- Run through the Cap Sauers Holding Nature Preserve, Cook County's largest undeveloped land.
- Navigate a course with over 1000 feet of elevation, considered mountainous for the Chicago area.
- Enjoy wide horsetrails that accommodate two-way traffic and participant encouragement.
Standout details
- Largest undeveloped land in Cook County
- Over 1000 ft of elevation
- Wide horsetrail course
- Sag Valley Trail system
Auto-drafted from the public listing — confirm details on the official event page before signing up.
Distances & registration
2 optionsRegistration for all distances is through the official signup link above.
- 10 Miles
Sat, May 9, 8:00 AM CDT · From $64.85
Opens May 11, 2025, 6:00 AM CDT · Closes Jun 5, 2025, 7:59 AM CDT
- 26.2 Miles
Sat, May 9, 7:30 AM CDT · From $70.15
Opens May 11, 2025, 6:00 AM CDT · Closes Jun 5, 2025, 7:59 AM CDT
Vibe Check
Steady Effort
Steady Effortlonger distance
- Rolling area
Based on terrain, weather, and distance data.
The course
- Rolling
From the organizer
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
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