| Yucaipa BOMB | Yucaipa | Club |
| Youth Bicyclists of Nevada County Foundation (YBONC) | Nevada City | Club |
| Yosemite South Gate Trail Cooperative | Bass Lake | Club |
| Woodside Beasts Cycling | Woodside | Race Team |
| Village Dirtbags | Lompoc | Club |
| Ventura County BOMB | | Club |
| Velo Girls | San Francisco Bay Area | Club |
| Ukiah Valley Trail Group | Ukiah | Club |
| U-LOCK MOB MTB | Downtown Los Angeles | Club |
| The TEAM - SoCalCross | Altadena | Club |
| The Mountainadoras | | |
| Tehachapi Mountain Trails Association | Tehachapi | Club |
| Team On Your Left | San Diego | Club |
| Tahoe Rim Trail Association | Lake Tahoe | Club |
| Tahoe Area Mountain Biking Association (TAMBA) | South Lake Tahoe | Club |
| Southern Sierra Fat Tire Association (SSFTA) | Bakersfield | Club |
| Sonoma County Trails Council (SCTC) | Santa Rosa | Club |
| Simple Green / Cycles Veloce | So Cal | Club |
| Sierra Buttes Trail Stewardship (SBTS) | Graeagle | Club |
| Shine Womens Gravity Race Team | Northern | Race Team |
| SHARE Mountain Bike Club | Orange County | Club |
| Share Mountain Bike Club | Corona Del Mar | Club |
| SF Urban Riders (SFUR) | San Francisco | Club |
| Santa Cruz Mountains Trail Stewardship (SCMTS) | Santa Cruz | Club |
| Santa Barbara Mountain Bike Trail Volunteers (SBMTV) | Santa Barbara | Club |
