F^3 Cap Sauers Trail Marathon
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F^3 Cap Sauers Trail Marathon & 10 Mile
The event takes place at Teason’s Woods (11200 S Willow Springs Rd) on Saturday, May 9, 2026. Two race distances are offered.
- Marathon
- 10 Mile
Both courses are run on the Sag Valley Trail. The surface is a wide horse trail with little to no technical trail running, and horses are usually present on the course. The marathon route consists of two circuits of the 10 mile course plus an additional 10k out-and-back to the west aid station. Marathon runners should expect two-way traffic on parts of the course.
Elevation totals are provided for each distance: the 10 mile has about 670 ft of elevation gain and the marathon about 1050 ft, described as "mountainous" by Chicago standards. Aid is available at multiple turnaround points; approximate mile marks are 2.9, 4.6, 7.8, 10, 12.9, 14.6, 17.8, 20, and 23.1. Station contents vary by location and include water, Gatorade Endurance lemon-lime, UCAN gel and a selection of food items; porta-potties are located at the east and west ends.
Race-day packet pickup is at the Teason’s Woods picnic shelter. Every participant receives a sunflower-themed t-shirt; finishers receive a wooden sunflower. Post-race offerings include chili, beer and awards. Parking at Teason’s Woods holds about 50 cars; an alternative lot at Saganashkee Slough East (10901 S Willow Springs Rd) is about 400 m away. Volunteers are invited and receive swag or discounts. Visit the organization's website for the most recent information.
