| Hillsborough Mountain Bike Association (HMBA) | Hillsborough | Club |
| Hood River Area Trail Stewards (HRATS) | Hood River | Club |
| Hoosier Mountain Bike Association | | Club |
| Hoot Toot and Whistle Bike Club | West Dover | Club |
| http://kernersvillecyclingclub.com/ | Kernersville, NC | Club |
| Idaho Cycling Enthusiasts | Pocatello | Club |
| Idyllwild Cycling | Idyllwild | Club |
| Illinois Valley Cycling Association | Mendota | Club |
| Indiana Bicycle Coalition (IBC) | Indianapolis | Club |
| Inland Valley Mountain Bike Association | Riverside County | Club |
| Intermountain Live Well | Northern Utah | Club |
| International Christian Cycling Club (IC3) Colorado | | Club |
| Iowa Coalition of Off Road Riders (ICORR) | Iowa City | Club |
| Iron Range Off Road Cyclists | Northern Minnesota | Club |
| Janesville Velo Club (JVC) | Janesville | Club |
| Jersey Off Road Bicycle Association (JORBA) | Hillsborough | Club |
| Jersey Shore Touring Society | Red Bank | Club |
| Kansas Singletrack Society | Wichita | Club |
| Kenosha Drivers Club | Kenosha | Club |
| Kentucky Mountain Bike Association | | Club |
| Kentucky Mountain Bike Association - Bluegrass | Bluegrass Region | Club |
| Kernersville Cycling Club | Kernersville | Club |
| Keweenaw Trekkers | Hancock | Club |
| Kickapoo Mountain Bike Club | Champaign/Danville | Club |
| Kingdom Trails Association | East Burke | Club |
