1990 AMA Pro Motocross Championship Spring Creek Motocross (Millville): 500MX Results
August 19, 1990
- Monster Energy AMA Supercross Championship
- AMA Pro Motocross Championship
- SuperMotocross World Championship
- FIM Motocross World Championship
- Progressive GNCC Racing
- Motocross of Nations
- FIM World Supercross Championship
- Australian Supercross Championship
- Women's Motocross Championship
- Monster Energy Cup
500MX Results
| Rider | Hometown | Motos | Bike | |
|---|---|---|---|---|
| 1 | | Sherwood, MI | 1 - 2 | Honda |
| 2 | Jeff Ward | Mission Viejo, CA | 3 - 1 | Kawasaki |
| 3 | Rick Johnson | El Cajon, CA | 2 - 3 | Honda |
| 4 | | Pontiac, MI | 4 - 5 | Kawasaki |
| 5 | Johnny O'Mara | Van Nuys, CA | 6 - 4 | Kawasaki |
| 6 | | Felton, CA | 11 - 7 | Honda |
| 7 | | Wappingers Falls, NY | 5 - 13 | Honda |
| 8 | Jimmy Button | Phoenix, AZ | 15 - 6 | Honda |
| 9 | | Lewisville, TX | 13 - 8 | Kawasaki |
| 10 | | Chino, CA | 10 - 16 | ATK |
| 11 | | Sylmar, CA | 18 - 9 | Honda |
| 12 | | North Canton, OH | 14 - 14 | Honda |
| 13 | | Columbia, CT | 7 - 31 | Kawasaki |
| 14 | | Yucaipa, CA | 8 - 38 | Kawasaki |
| 15 | | Hesperia, CA | 9 - 33 | Honda |
| 16 | | Capistrano Beach, CA | 24 - 10 | Honda |
| 17 | | Colts Neck, NJ | 19 - 12 | Honda |
| 18 | | Dexter, MI | 16 - 15 | Kawasaki |
| 19 | | Pembroke, MA | 37 - 11 | KTM |
| 20 | | Lakewood, CO | 12 - 21 | Kawasaki |
| 21 | | Gainesville, TX | 28 - 17 | Honda |
| 22 | | Cherry Valley, CA | 17 - 32 | Yamaha |
| 23 | | Lake Elsinore, CA | 22 - 18 | ATK |
| 24 | | Dayton, OH | 27 - 19 | Kawasaki |
| 25 | | Fontana, CA | 26 - 20 | Honda |
| 26 | | Oswego, IL | 20 - 36 | Honda |


