SuperNats XXVIII

165DAYS

2026 Winter Series

223DAYS

2025 Pro Tour

55DAYS

SKUSA Mexico

34DAYS

2025 PKC

21DAYS

2025 TSRS

NOW!

Next ProKart Challenge Event


PRE-ENTRY OPEN NOW
Closes Tues, June 17 at 11:59 PM PDT
 
Round 4 - K1 Circuit June 21-22, 2025
K1 Circuit
32240 Grand Ave
Winchester, CA 92596
k1circuit.com
Google Maps
There will be a Sunoco vendor pumping fuel.
There will be no camping at this facility for the foreseeable future.

California ProKart Challenge
2025 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.  We haven't raised our entry fees since the $10 increase in 2020, but with the dramtic increase in track rental fees we have little choice but to raise them this season.

NOTE: Retail prices for tires have increased approximately 5.5% across the board due to tariffs affecting our shipments. Hopefully this is a temporary and our only increase.
  • $413 - Pre-Entry + Blue Evinco SK-H2 Race Tires
  • $424 - Pre-Entry + Red Evico SK-M2 Race Tires
  • $175 - Pre-Entry Only
  • $200 - 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.
  • $249 +tax per set Evinco SK-M2 ‘Red’ practice or race tires for Pro and Master Shifter. 
  • $238 +tax per set Evinco- SK-H2  ‘Blue’ practice or race for Mini/Micro Swift, KA100 and FZ Shifter 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

  • $251.68 +tax per set MG-SW2 practice or race tires for Micro/Mini Swift and Mini Shifter. 
  • $258 +tax per set MG-SW2 practice or race for KA100 and Shifter Classes.

Extras

  • $150 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.

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
  • $35 for 2-day 
  • $45 for 3-day (double header events)