Sign up today to reserve your spot in the 2018 Mammoth Motocross. Many classes have sold out through Road to Mammoth pre-qualification.  Space is still available in select classes.




2018 Monster Energy Mammoth Motocross

  • 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 Xtrm, Sale is final. Identification is required for riders in practice and races. Any questions regarding these matters may be directed to 760.934.0605
  • Riders 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