1991 AMA Pro Motocross Championship
Motocross Race Results
- 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
- MotocrossUnadilla Motocross October 13, 1991
- MotocrossBudds Creek Motocross October 6, 1991
- MotocrossSteel City Raceway September 29, 1991
- MotocrossBroome-Tioga Sports Center September 22, 1991
- MotocrossWashougal Motocross September 1, 1991
- MotocrossSpring Creek Motocross (Millville) August 11, 1991
- MotocrossMoto-X 338 August 4, 1991
- Motocross
- MotocrossLake Sugar Tree MX Park July 21, 1991
- MotocrossRedBud Track 'n Trail July 7, 1991
- MotocrossHigh Point Raceway May 26, 1991
- Motocross
- MotocrossGatorback Cycle Park March 3, 1991