F^3 Cap Sauers Trail Marathon & 10 Mile
Updated
Saturday, May 8, 2027, first start 7:30 AM, in Palos Hills (11200 S Willow Springs Rd). Distances: 10 miles, Marathon. Entry from $75 to $95; the Marathon goes from $95 to $105 after November 9.
- Date
- Saturday, May 8, 2027
- Start time
- 7:30 AM (earliest wave)
- Location
- 11200 S Willow Springs Rd, Palos Hills, IL 60465
- Area
- South Suburbs, Chicago
- Distances
- 10 milesMarathon
- Course
- Trail (dirt or single-track on at least part of the course)
- Price
- $75 to $95 plus the platform's processing fee
- Next price increase
- Monday, November 9, 2026: Marathon $95 → $105
- Registration
- Open. Opened June 1, online signup closes Saturday, May 8, 2027
How to register
Registration is on RunSignup. Pick your distance, add any extras, and you'll get a confirmation email with your bib details. Sign up by November 9 to pay $95 instead of $105.
Register on RunSignup →Race website
Course and race notes
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!
From the race's own listing. Check the race website for the course map and parking.
Source: RunSignup public race API, refreshed 2026-10-17. Details can change; the registration page is the final word.