SuperNats XXII


SKUSA Winter Series


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California ProKart Challenge

Round 5 - June 25-26, 2010 – Buttonwillow Raceway

Race Entry

Pre-entries and pit space reservations may be submitted through the ProKart Online Store. For our web-challenged friends, use this printable/faxable entry form. If you have any questions, email This e-mail address is being protected from spambots. You need JavaScript enabled to view it    or call 951-491-0808 for assistance. NOTE: If this is your first transaction through the online store, click on the “Create New Account”  link when prompted and complete the forms presented. For subsequent transactions, just enter the login ID and password you created to retrieve your stored entry profile. SPECIAL NOTE: Login ID and password cannot contain blank spaces.

Pre-Entry – Enter Before the Cut-Off and Save!
The definition of a “PRE-ENTRY” is an entry received, with payment, at the ProKart Challenge office by midnight on the Wednesday prior to the event, and will qualify for the pre-entry pricing. Entries after this cut-off will have to be submitted at the event (starting Friday morning) at walk-up pricing. See pricing below. All race pre-entries will be confirmed via email within 1 business day of receipt at the PKC/SKUSA home office. If you do not receive an email confirmation within 24 hours, please call 951-491-0808 to confirm that your entry has been received and is in process.

Pre-Entry closes at Midnight on Wed, June 23rd.  Anyone wanting to register for the race or Friday's practice after that time will have to sign-up at the track on Friday starting at 7:00am or Saturday starting at 6:30am. 

Entry Fees
ALL CLASSES (active SKUSA membership required for race days):
  • $60 Practice Day
  • $115 Pre-Entry Race Fees for 1st Class - $75 for 2nd Class
  • $150 Post-Entry / At Track Race Fees for 1st Class - $75 for 2nd Class
  • $20 Transponder Rental ( If you don't have your own )
  • $212+tax per set Practice or Race Tires (may be reused from previous event). Tires can be picked up at the track or shipped ahead of time for $10 (Shipping & Handling - Flat Fee within continental US).
    Note: Race Tires MUST have the special PKC stamp to pass tech.
  • $58+tax  for 5gal can of VP MS98
  • $65+tax  for 5gal can of VP C12
  • $15+tax for 1L Motul 2T Grand Prix
  • $30 Reserved Pit Space
  • $50 Overnight Camping
  • $15 (1-day), $20 (2-day) Pit Pass (crew and spectators)
  • $75 SKUSA Annual Membership (must be current member)
Race entry fee includes one driver’s pit pass and one UNRESERVED pit space (first come, first served of unreserved and available pit spots).

Driver Age
If the driver is less than 18 years old, you must fax a copy of his/her birth certificate to (951) 491-0809 with the first entry of the season.  Be sure to check the Classes section of this site or sections 15.3 and 20.1.2 of the 2008-2010 SKUSA Rulebook for minimum age requirements of each class.