Unbound Gravel 200
📍 Kansas, Flint Hills, USA
Texas and Michigan, USA · 11–12 April 2026
Difficulty: 4/5 — Very hard
An ultra-endurance, 24-hour single-stage challenge covering up to 173 miles of scenic dirt paths, quiet paved sectors, and trails. Navigated entirely by GPS, this self-supported format tests mental fortitude and physical limits in a non-stop format.
Visit official site →This event is ideal for seasoned endurance cyclists, gravel racers, and bikepackers looking to push their boundaries in a 24-hour self-navigated challenge.
Riders who struggle with self-supported navigation, riding through the night under sleep-deprived conditions, or managing their own pacing without extensive course marking will find this event highly demanding.
Prioritize long-duration aerobic base training, back-to-back endurance block rides, night-riding preparation, and testing your electronics and GPS navigation setups.
Compare your W/kg to see how you stack up against this race's typical level — and which races fit you best right now.
Riders have exactly 24 hours to complete the non-stop course, starting at 12:00 PM on Saturday and finishing by 12:00 PM on Sunday.
Yes, there are three fully stocked water points run by local volunteers, spaced roughly 25 to 55 miles apart. While there are no full race villages, the third water point features tents and mattresses for quick power naps.
Participants can ride a gravel bike, mountain bike, cyclocross bike, or even a tandem mountain bike.
No, there is no physical course marking. The route must be navigated entirely using GPS tracking.
The terrain is highly rideable, with over 80% of the route consisting of non-technical dirt roads, supplemented by quiet paved sectors, farm doubletracks, and light trails.
No prior qualification is required, meaning any cyclist can sign up. However, the event entry is strictly limited to 200 riders.
📍 Kansas, Flint Hills, USA
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