Unbound Gravel

Starting and ending in Emporia, the routes runs along rural roads in the Flint Hills of east-central Kansas.[3] In some years the temperature on the route has exceeded 100 °F (38 °C), while other years have seen rain or hail.[9] It is not uncommon for rain to turn some dirt roads into "mud roads".

There are checkpoints spaced about 50 miles apart for longer races, and riders must carry water and food, as well as fix their own tires and bikes.[10][11] If riders receive outside support at any location other than official checkpoints it will result in immediate disqualification. Riders may assist other riders by any means and at any time.[3]

Originally, the event was started as a 200-mile (320 km) mile race, but over the years additional lengths have been added to encourage more riders to give it a chance. Though the name of the race distances are rounded off to nice numerical values, the actual distance of each race is slightly different.

The event consists of the following races:

• Unbound Gravel XL is a 350-mile (560 km) race. It was introduced in 2018.[12]
• Unbound Gravel 200 is a 200-mile (320 km) race. The original Dirty Kanza ultra endurance gravel bicycling challenge was started in 2006.[13]
• Unbound Gravel 100 is a 100-mile (160 km) race. It was introduced in 2013.[9]
• Unbound Gravel 50 is a 50-mile (80 km) race. It was introduced in 2013.[9]
• Unbound Gravel 25 is a 25-mile (40 km) race. It was introduced in 2013.[9]
• Unbound Gravel Junior is a 25-mile (40 km) race for 7th to 12th grade teens.

Waiting for Dirty Kanza bike race to start at sunrise in Emporia, Kansas

In 2006, the first year of Dirty Kanza had 34 riders.[13] It was organized by Joel Dyke and Jim Cummins, and modeled off of similar rides Trans-Iowa and the Flint Hills Death Ride.[14]

In 2018, Life Time Fitness purchased Dirty Kanza Productions.[15] That year the race had 2,500 registered riders.[16]

In 2019, the race had 2,750 registered riders.[17]

Several changes occurred in 2020. First the races were postponed from May 29–31 to September 10–13 because of the ongoing worldwide COVID-19 pandemic issues,[18] then later were cancelled.[19]

Organizers considered a name change for the event to remove reference to Kaw nation (also known as Kanza) based on an online petition despite representatives of the Kaw Nation responding to the allegations, saying "Life Time and the Kaw Nation are proud of our relationship, which is built upon mutual respect, dignity, and integrity" and "It was felt that 'Kanza' paid homage to the region (the Kanza Prairie), to its rich history, and to all things associated with the region, including the Kaw Nation".[20][21] The same year, the event's surviving founder made a statement that the police shooting of an intoxicated black man in Atlanta who grabbed an officer's taser and fired it at the officer was "justified".[22] The ensuing controversy resulted in his eventual firing by the event's parent company, Life Time Fitness.[23][24] On October 29, 2020, it was announced that the name of the race would be changed to Unbound Gravel.[25]

In 2021, the race had 2,626 registered riders.[13]

Rebecca Rusch is notable for placing first female in six events across three distances: DK XL in 2018; DK 200 in 2012 / 2013 / 2014; DK 100 in 2016 and 2017.

Unbound Gravel XL

Before 2020, the race was known as the Dirty Kanza XL (or DK XL). This 350 mile race was first held in 2018. Results verified at Athlinks.[26]

Year	Male	Female
2023	Logan Kasper	Kristen Legan
2022	William Harrison	Cynthia Frazier
2021	Taylor Lideen	Lael Wilcox
2020	N/A (race cancelled)	N/A (race cancelled)
2019	Jay Petervary	Lael Wilcox
2018	Matt Acker	Rebecca Rusch

Unbound Gravel 200

Before 2020, the race was known as the Dirty Kanza 200 (or DK 200). This 200 mile race was first held in 2006. Results verified at Athlinks.[26]

Year	Male	Female
2023	Keegan Swenson	Carolin Schiff
2022	Ivar Slik	Sofía Gómez Villafañe
2021	Ian Boswell	Lauren De Crescenzo
2020	N/A (race cancelled)	N/A (race cancelled)
2019	Colin Strickland	Amity Rockwell
2018	Ted King	Kaitlin Keough
2017	Mat Stephens	Alison Tetrick
2016	Ted King	Amanda Nauman
2015	Yuri Hauswald	Amanda Nauman
2014	Brian Jensen	Rebecca Rusch
2013	Dan Hughes	Rebecca Rusch
2012	Dan Hughes	Rebecca Rusch
2011	Dan Hughes	Betsy Shogren
2010	Corey Godfrey	Emily Brock
2009	Michael Marchand	N/A
2008	Cameron Chambers	Kristen High
2007	Steve Goetzelman	Leslie Hiemenz
2006	Dan Hughes	N/A

Unbound Gravel 100

Before 2020, the race was known as the DK 100. This 100 mile race was first held in 2013 as the DK Half Pint. It became an official race distance in 2019. Results verified at Athlinks.[26]

Year	Male	Female
2023	David Brower	Tiffany Cromwell
2022	Ethan Overson	Marisa Boaz
2021	Stephen Hyde	Lauren Stephens
2020	N/A (race cancelled)	N/A (race cancelled)
2019	Ashton Lambie	Lauren Stephens
2018	Matthew Accarrino	Erica Mueller
2017	Steven Baxter	Rebecca Rusch
2016	Guy Alvarez	Rebecca Rusch
2015	Austin Morris	Jennifer Rhoades
2014	David Wilson	Danielle Pellicano
2013	Mark Schloegel	Lynn Malir

• Ultra-distance cycling
• Leadville Trail 100 MTB, a mountain bike race in Leadville, Colorado

Wikimedia Commons has media related to Unbound Gravel.

• Official race website
• 2018 DK200 race footage (example of race and road conditions)
• Highway maps: Emporia city map, Lyon County map (includes Emporia), Kansas map.