| Northwest MX promoters |
| | Alberta International Oldtomers Motocross |
| | AMA District 27 |
| | British Columbia Oldtimer Motorcross |
| | CMC |
| | Extreme Motorsports |
| | Fantom Z ATV Promotions |
| | Washington Oldtimers MX |
| | Loretta Lynn's |
| | MOTOLAND MX Productions |
| | Mt Baker Motorcycle Club |
| | Northwest Racing Association |
| | OPMC |
| | Oregon Oldtimers Motocross |
| | Over the Bars Gang |
| | Pacific Raceways |
| | Pacific Racing Organization |
| | Promoto Promotions |
| | Seattle Motorcycle Club |
| | Squisher Racing |
| | Vintage Dirt Racing Northwest |
| | Washington Oldtimers Motocross |
| | White knuckle racing |
| | WHR Motorsports |
| | Wide Open Sports Arena |
| | WORCS |
| | Tuesday, April 18, 2006 |