Online Registration for Sonoma is OPEN. Pre entry deadline is 4/15/2025. All entries posted after the deadline are subject to our $250 late entry fee.

For 2025 we have adopted Race Select for our event registration needs. Many of you are already familiar with their process, but for those who are not, don’t worry it’s easy. Register as a new user, select Challenge of the Americas events, and complete the easy to understand form. 

REGISTER HERE

All entries posted after the pre entry deadline are subject to a $250 late fee. If you are having issues with the online service or want to pay directly by check or credit card, you may do so by printing the Entry Form PDF below and mailing/emailing it to us. The pre-entry deadline still applies, any forms received after the pre-entry deadline will be assessed the late fee. Entry Form PDF Download

REFUND POLICY: There are no refunds for pre-entries. By entering I understand that there are no refunds once I pre-enter for an event. All items include applicable sales tax.