SuperNats XXVIII

57DAYS

2026 Winter Series

115DAYS

2026 Pro Tour

193DAYS

SKUSA Mexico

165DAYS

2025 PKC

25DAYS

2025 TSRS

3DAYS

Next ProKart Challenge Event

PRE-ENTRY OPEN NOW
Closes Tues, Oct 7 at 11:59 PM PDT

K1 Oct 3-5 - PRE-ENTRY OPEN NOW
Closes Sept 29 at 11:59 PM PDT
Schedule // Pit Spots // Pit Passes

Round 6 - K1 Circuit October 11-12, 2025
K1 Circuit
32240 Grand Ave
Winchester, CA 92596
k1circuit.com
Google Maps
There will be a Sunoco vendor pumping fuel.
There is no camping at this facility.

California ProKart Challenge

Streets of Willow Reminders
Monday, 26 March 2018 07:50
You have until MONDAY NIGHT-- MARCH 26TH AT MIDNIGHT to order any Evinco or MG tires, SK-1 pipes, or Timing Plates thru the SKUSA dealer PORTAL to be brought to the Willow Springs track this weekend. Shipping order cutoff for this week is TUESDAY NIGHT -- MARCH 27TH AT MIDNIGHT for us to ship out tires or pipes by Wednesday 3/28. Then we won’t be shipping products again until Monday, April 2nd.

Monday night is also our PRE-ENTRY cutoff to register for this event and renew or purchase SKUSA memberships. All event info can be found at the links HERE.

If you are an IAME USA WEST dealer, you will receive a separate email from Alexis regarding IAME orders.