| Gallatin Valley Bicycle Club | Bozeman | Club |
| Gallup Trails (GALLUP) | New Mexico | Club |
| Gallup Trails 2010 | Gallup | Club |
| Gateway Off-Road Cyclists (GORC) | St. Louis Area | Club |
| Genesee Region Off-Road Cyclists(GROC) | Rochester | Club |
| Gianni Cycling | Occidental | Club |
| Glacial Edge Area Riding Society (GEARS) | Plymouth | Club |
| Graham Swamp Trail Crew Inc. | Flagler County | Club |
| Gravity Riders Organization of Arizona | Phoenix | Club |
| Great Falls Bicycle Club | Great Falls | Club |
| Great Valley Mountain Bike Team | Malvern | Race Team |
| Greater Boston NEMBA | Greater Boston area | Club |
| Greater Houston Off Road Biking Association | Houston metro area | Club |
| Greater Lynchburg Off-Road Cyclists | Lynchburg | Club |
| Greater Oakridge Area Trail Stewards (GOATS) | Oakridge | Club |
| Greater Portland NEMBA (New England Mountain Bike Association) | Greater Portland | Club |
| GS Boulder | Boulder-ish | Club |
| Gunnison Trails | Gunnison | Club |
| Gwinnett Area Trail Riders (SORBA) | Gwinnett County outside Atlanta | Club |
| Hampton Roads Mountain Bikers | Hampton Roads | Club |
| Hawaii Bicycling League (HBL) | Honolulu | Club |
| Helena Bicycle Club | Helena | Club |
| High Sierra Cyclists | Ridgecrest | Club |
| Highland Rimmers Bicycle Club | Tullahoma | Club |
| Highlands Trail Foundation | Elkins | Club |
