1991 AMA Pro Motocross Championship Spring Creek Motocross (Millville): 500MX Results
August 11, 1991
- 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 | | France | 1 - 1 | Honda |
| 2 | | Sherwood, MI | 3 - 2 | Honda |
| 3 | | Charlotte, NC | 2 - 4 | Yamaha |
| 4 | Jeff Ward | Mission Viejo, CA | 4 - 3 | Kawasaki |
| 5 | Ron Lechien | El Cajon, CA | 5 - 5 | Kawasaki |
| 6 | | Columbia, CT | 7 - 6 | Kawasaki |
| 7 | | North Canton, OH | 8 - 8 | Kawasaki |
| 8 | Lance Smail | Kent, WA | 9 - 9 | Kawasaki |
| 9 | | Pontiac, MI | 6 - 12 | KTM |
| 10 | | Sedalia, CO | 10 - 10 | Yamaha |
| 11 | | Pembroke, MA | 14 - 11 | KTM |
| 12 | | Bremerton, WA | 12 - 13 | Honda |
| 13 | | Litchfield Park, AZ | 19 - 7 | Kawasaki |
| 14 | | Hudsonville, MI | 11 - 15 | Kawasaki |
| 15 | | Guttenberg, IA | 15 - 16 | Kawasaki |
| 16 | | Colts Neck, NJ | 16 - 18 | Suzuki |
| 17 | | Worth, IL | 13 - 35 | Honda |
| 18 | | Capistrano Beach, CA | 21 - 14 | Kawasaki |
| 19 | | Earlville, NY | 18 - 17 | Yamaha |
| 20 | | Monterey, CA | 17 - 19 | Honda |
| 21 | | Kalamazoo, MI | 20 - 20 | Kawasaki |


