SuperNats XXVII


2025 Winter Series

2025 TBA

2024 Pro Tour


SKUSA Mexico


2024 PKC


2024 TSRS


Next ProKart Challenge Event


Round 1 - Buttonwillow March 23-24, 2024
Buttonwillow Raceway Park
24551 Lerdo Highway
Buttonwillow, CA 93206
(661) 764-5333
Website // Google Maps

California ProKart Challenge

2024 Pricing Overview

Pre-Entry Fees

The definition of a “PRE-ENTRY” is an entry received, with payment, at the ProKart Challenge office before midnight on the cut-off date (see event info above) and will qualify for the pre-entry pricing. Entries after this cut-off will have to be submitted at the event during reg hours at walk-up pricing.
  • $360* - Pre-Entry + Blue Evinco SK-H2 Race Tires
  • $370.50* - Pre-Entry + Red Evico SK-M2 Race Tires
  • $135 - Pre-Entry Only
  • $170 - Walk-Up Entry

Evinco Spec Tires

Race tires and pre-ordered practice tires are delivered to each event for free.  All tires are event delivery only.
  • $235.50* +tax per set Evinco-M ‘Red’ practice or race tires for X30 SR/Ms and all Shifter classes. 
  • $225* +tax per set Evinco-H ‘Blue’ practice or race for Mini/Micro Swift, X30 Jr and KA100 classes.
Note: Although unused Race Tires can be used at another PKC event, Race Tires MUST have the special PKC stamp to pass tech and be 'sticker tires' for all competition sessions from qualifying to the end of the race day.

MG-WT Rain Tire

  • $238.50* +tax per set MG-SW2 practice or race tires for Micro/Mini Swift. 
  • $244.50* +tax per set MG-SW2 practice or race for X30, KA100 and Shifter Classes.


  • $100/125 Practice Day.
  • $25 Transponder Rental ( If you don't have your own )
  • SKUSA Annual Membership - $150 for new members, $100/$125 Standard/Late Renewal (during renewal periods)
  • Reserved Pit Space - See Pit Space Reservations Page for each event.
  • Overnight Camping - See Pit Space Reservations Page for each event.
  • SKUSA’s Spec Fuel (Sunoco 112) and Spec Oil (Elf HTX909) are mandatory at these events. Please make arrangements to get the spec fuel and oil from your local kart shop or team for this event.

Spectator Passes

Spectator passes are required for all guests, including mechanics at the track at these prices; 5 years old and under are No Charge (but must be signed in by a parent or legal guardian and receive wristband on site).
  • $20 for 1-day
  • $30 for 2-day