Trail Mix Off-Road Duathlon 2026
Off-road duathlon at Atwood Park in Rockford, Illinois, pairing trail running with 10- or 20-mile mountain bike legs, benefiting local trail-building efforts.
The vibe
Run, bike, run, repeat for the trails
Trail Mix pairs trail running with mountain biking on the Atwood Park trail system outside Rockford — run, then bike, then run again, with a “Half Mix” option for anyone easing in and standalone 10-mile or 20-mile MTB-only races for riders who’d rather skip the running legs entirely.
New for 2026, the event adds “Fastest Lap” prizes on top of the overall duathlon standings, giving sprint-focused riders something to chase even if the full multi-sport format isn’t their thing. Proceeds go straight back into trail development at Rock Cut State Park and Atwood itself — you’re racing on trails that your entry fee helps maintain.
Early-bird pricing runs through mid-September, so register early if the discount matters.