Unbound Gravel
| Race details | |
|---|---|
| Date | First weekend after Memorial Day |
| Region | Flint Hills around Emporia, Kansas, United States |
| Discipline | Gravel cycling |
| Competition | Professional and amateur |
| Race director | Ben Sachs |
| Web site | unboundgravel |
| History | |
| First edition | 2006 |
| Editions | 19 (as of 2024) |
| First winner | Dan Hughes (2006) Leslie Hiemenz (2007) |
| Most wins | Dan Hughes (4 wins) Rebecca Rusch (3 wins) |
| Most recent | Cameron Jones (2025) Karolina Migoń (2025) |
Unbound Gravel, formerly known as the Dirty Kanza, is an event comprising gravel racing covering various distances held annually during the late spring on rural roads in the Flint Hills region of the Great Plains around Emporia, Kansas, United States. The race's organizers refer to the 200 miles (320 km) race as the "World's Premiere Gravel Grinder", and ranked as one of the top gravel bike races. In 2024, there were approximately 5,000 registered riders across all races.