Registration opens May 1st

Look here for xtrm details:

How to Enter the 2010 Monster Energy Mammoth Motocross:
Online entries for the Mammoth Motocross open May 1st and will be limited to spots not secured by the qualifier.

Even if you qualified you must register. go to www.xtrm.com find your name and register before April 23rd 5pm

On May 1st, follow the link www.xtrm.com sign in, select Mammoth Motocross, select class and enter. Class entries open at 8am for Vets/Sr/Master, 12 noon for All Mini Classes, and 2pm for all bike classes. Remember to select your practice as well.

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