| Alameda County Central Railroad Society |
Pleasanton, California, USA |
| Bay Area Garden Railway Society |
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 |
| 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 |
| 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 |
| Redwood Empire Division |
California, USA |
| Redwood Empire Garden Railway Society |
California, USA |
| Sacramento Valley Garden Railway Society |
California, USA |
| San Diego Division |
California, USA |
| Sierra Division |
CA & NV, USA |
| Walnut Creek Model Railroad Society |
Walnut Creek, California, USA |
| Western Division of the TCA |
CA & NV, USA |
