Lace up for the GristMill Grind on September 5, 2026, a truly challenging 10K and 5K adventure nestled within the picturesque Franklin Creek State Natural Area in Franklin Grove, IL. Known by runners as one of the most demanding courses in the region, this technical trail race promises an unforgettable experience as you traverse through breathtaking ravines, scenic bluffs, and dense forested canopies. Both distances feature significant elevation gain, approximately 100 feet per mile, with the 10K runners tackling five creek crossings and 5K participants navigating two—so be prepared to get your feet wet! The stunning natural beauty of limestone bluffs and bubbling springs provides a magnificent backdrop to this rigorous event.

The GristMill Grind is more than just a race; it's an opportunity to immerse yourself in a unique natural setting while supporting a vital cause. All proceeds directly benefit the Franklin Creek Conservation Association, funding crucial park programs, expansion, and improvements. Participants can expect typical race day conditions in early September, with highs around 78°F and lows near 56°F, and a modest 14% chance of precipitation. Drinking water will be available at the start/finish area and at the Sunday shelter, marking the mid-race point for the 10K, though runners are encouraged to bring their own reusable cups or bladders to minimize environmental impact.

Starting and finishing near the historic Hausen Knox Shelter, this sixth annual event is renowned for its well-maintained trails and dedicated volunteers. Whether you're a seasoned trail runner seeking a formidable challenge or looking to support conservation efforts, the GristMill Grind offers a rewarding journey through one of North Central Illinois' hidden gems. You'll leave impressed by both your accomplishment and the natural splendor of Franklin Creek.