| Group |
| Sacramento Region SCCA |
| San Francisco Region SCCA |
| National Auto Sport Association (NASA) |
| Northern California Racing Club (NCRC) |
| Group |
| Green Flag Driving |
| Cal Poly Sports Car Club, (CPSCC) |
| Nor Cal Shelby Club |
| Sacramento Valley Region of the Porsche Club of America |
| Group |
| Laguna Seca |
| Group |
| Durango Owners Club |
| Mustang Special Service Registry |
| SVO Club of America |
| SCCA National |