2023 Rider Registration
Rider registration is now closed.
- All entries are the property of the Mammoth Motocross, are non-refundable, not transferable, and not available for resale. Once entries have been submitted to Regio, sale is final. Identification is required for riders in practice and races. Any questions regarding these matters may be directed to 559.500.5360.
- It is the rider's responsibility to have the correct number and background prior to staging for first moto.
- Red Backgrounds for King of the West Class Winners Only
White Backgrounds/Black Numbers
All C Classes
65cc 6-9 - White Backgrounds/Black Numbers
85cc 9-12- White Backgrounds/Black Numbers
Black Backgrounds/White Numbers
All B Classes
65cc10-11- Black Backgrounds/White Numbers
Yellow Backgrounds/Black Numbers
All Pro/A Classes
Smoke and Fire Vintage - Your Choice
All 50+ A - Your Choice
All 50+ B - Your Choice
All 50+ C - Your Choice
All 60+ - Your Choice
50cc - Your Choice
65cc Open - Your Choice
Mini Sr 1 12-13 - Your Choice
Mini Sr 2 9-14 - Your Choice
Supermini 1,2 - Your Choice
Schoolboy 1,2 - Your Choice
College Boy - Your Choice
Women 12+ - Your Choice
Two Stroke Challenge - Your Choice
+25 A/B/C - Your Choice
125cc - Your Choice
250 B/C Open - Your Choice
250 C Jr - Your Choice
Mammoth Motocross is an AMA-sanctioned event and runs according to the rules developed and written by AMA Congress, the rules-making body of the AMA composed of AMA organizers. The AMA Amateur Competition Rulebook is for the exclusive use of AMA-chartered clubs and promoters running AMA-sanctioned events.
The rulebook applies to all AMA-sanctioned competitions. Supplemental regulations are additions to the rule book based on the needs of a specific series. All supplemental regulations are approved by the AMA.
For rules and qualifying processes specific to Road to Mammoth, King of the West, and Mammoth Motocross, please read the rider rulebook.
View Rider Rulebook