1981 AMA Pro Motocross Championship RedBud Track 'n Trail: 500MX Results
July 5, 1981
- 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, OR | 2 - 1 | Honda |
| 2 | Broc Glover | El Cajon, CA | 1 - 2 | Yamaha |
| 3 | | Yucca Valley, CA | 3 - 5 | Honda |
| 4 | | Lakewood, CA | 7 - 3 | Yamaha |
| 5 | | Troy, MI | 5 - 4 | Maico |
| 6 | | Farmingdale, NJ | 4 - 6 | Maico |
| 7 | | Anaheim, CA | 6 - 8 | Kawasaki |
| 8 | | Colorado Springs, CO | 10 - 7 | Yamaha |
| 9 | Marty Smith | San Diego, CA | 8 - 10 | Suzuki |
| 10 | | Marietta, OH | 14 - 9 | Maico |
| 11 | | Burlington, WI | 13 - 12 | Kawasaki |
| 12 | | Girard, PA | 12 - 14 | Husqvarna |
| 13 | | Cedar Rapids, IA | 17 - 11 | Yamaha |
| 14 | | Santa Cruz, CA | 9 - 22 | Husqvarna |
| 15 | | Brooksville, FL | 11 | Yamaha |
| 16 | | El Paso, TX | 15 - 18 | Yamaha |
| 17 | | San Clemente, CA | 21 - 13 | Husqvarna |
| 18 | | Hightstown, NJ | 16 - 19 | Maico |
| 19 | | Bristol, PA | 23 - 15 | Husqvarna |
| 20 | | Harrisburg, PA | 19 - 17 | Maico |
| 21 | | Lebanon, PA | 26 - 16 | Honda |
| 22 | | Medina, OH | 18 - 20 | Maico |
| 23 | | Painesville, OH | 20 | Husqvarna |


