| Alameda County Central Railroad Society |
Pleasanton, California, USA |
| Bay Area Garden Railway Society |
San Francisco Bay Area, California, USA |
| Bay Area Meter Gauge Module Group |
San Francisco Bay Area, California, USA |
| Belmont Shore Model Railroad Club |
San Pedro, California, USA |
| Cajon Division |
CA & NV, USA |
| California Central Model Railroad Club |
Santa Clara, California, USA |
| Carquinez Model Railroad Society |
Crockett, California, USA |
| Coachella Valley Model Railroaders |
Indio, California, USA |
| Coast Division |
CA & HI, USA |
| Coastal Valley Lines Model Railroad Club of Sonoma County |
Santa Rosa, California, USA |
| Corona Model Railroad Society |
Corona, California, USA |
| Daylight Division |
California, USA |
| Diablo Pacific Short Line |
San Francisco Bay Area, California, USA |
| East Bay Model Engineers Society |
Point Richmond, California, USA |
| European Train Enthusiasts - Sacramento Chapter |
Sacramento, California, USA |
| European Train Enthusiasts - San Francisco Bay Area Chapter |
San Francisco Bay Area, California, USA |
| Golden Gate American Flyer Club |
Walnut Creek, California, USA |
| Golden Gate Lionel Railroad Club |
Mountain View, California, USA |
| Group 160 NTRAK Club |
Los Angeles, Kern, & Ventura Counties, California, USA |
| Highland Park Society of Model Railroad Engineers |
San Gabriel, California, USA |
| Los Angeles Division |
California, USA |
| Los Angeles Model Railroad Society |
Harbor City, California, USA |
| NMRA Pacific Coast Region |
CA, HI, & NV, USA |
| NMRA Pacific Southwest Region |
AZ, CA, & NV, USA |
| North Coast Historical Model Railroad Society |
Healdsburg, California, USA |
| Northern California Division of the TCA |
CA & NV, USA |
| Orange County Module Railroaders |
Orange County, California, USA |
| Peninsula NTRAK |
San Francisco, California, USA |
| Redwood Empire Division |
California, USA |
| Redwood Empire Garden Railway Society |
Sonoma & Marin Counties, California, USA |
| Roseville Roundhouse Model Railroad Association |
Roseville, California, USA |
| Sacramento Valley Garden Railway Society |
California, USA |
| San Diego Division |
California, USA |
| San Diego S-Gaugers |
La Mesa, California, USA |
| Sierra Division |
CA & NV, USA |
| Silicon Valley Lines |
San Jose, California, USA |
| Slim Gauge Guild |
Pasadena, California, USA |
| Tidewater Southern Model Railroad Club |
Stockton, California, USA |
| Toy Train Operating Society - Southern Pacific Division |
Costa Mesa, California, USA |
| Walnut Creek Model Railroad Society |
Walnut Creek, California, USA |
| Western Division of the TCA |
CA & NV, USA |
