California

Bay Area Velo Girls
Bicycle Outfitter
Bike Map Dude
Caltech Bicycle Club
Concerned Off-Road Bicyclists Association
Cyclo-Vets
Grizzly Peak Cyclists
Major Taylor Cycling Club
Mannhattan Beach Grand Prix
Marin Cyclists
Mountain Biking (San Francisco Area)
Northern California/Nevada Cycling Association
Oakland Yellow Jackets Cycling Club
Ogre's Guide to Northern California Mountain Biking
Pure Choice Trail Riders Association
Ranchos Cycling Club
Responsible Organized Mountain Peddlers
San Diego Bicycle Club
SoCalMtB
South Coast Single Tracks
The Bike - San Francisco Bay Area Rides
Twin Peaks Cycling Club
Wine Country Bikes (Bike Tours and Rentals in Northern California)