SuperNats XXVIII

201DAYS

2026 Winter Series

TBA

2025 Pro Tour

28DAYS

SKUSA Mexico

21DAYS

2025 PKC

57DAYS

2025 TSRS

35DAYS

Next ProKart Challenge Event


PRE-ENTRY OPEN SOON

 

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

Big Numbers and Exciting Racing for California ProKart Challenge at CalSpeed
Thursday, 07 June 2018 14:29

(Photo: DromoPhotos.com)

The 2018 season for the California ProKart Challenge resumed on June 1-2 as the program visited the CalSpeed Karting Center in Fontana, California. After taking the months of April and May off for the SKUSA Pro Tour SpringNationals, racers from all over the western half of the United States converged on the ‘Grande’ circuit that sits just outside the Auto Club Speedway facility, where many of the southern California karters call home. The total number of racers reached the 150 mark, as the series met the halfway point of the championship chase by putting Round Three into the books.
Read more...
 
Happy Memorial Day! Don’t miss Tonight’s Pre-Entry Cutoff for the California ProKart Challenge at CalSpeed!
Monday, 28 May 2018 10:54
Tonight at midnight PDT, Monday May 28, is the cutoff to pre-register for this weekend’s PKC Championship round #3 at CalSpeed in Fontana, CA. Registration and SKUSA memberships can be handled at https://www.motorsportreg.com/orgs/skusa. All event details are posted at http://www.superkartsusa.com/regional/california-pkc.html Save on the walk-up entry fee and do it now!

Move-in starts Thursday 5/31 at 11am. Hope to see you there!
 
Prokart Challenge Returns to Calspeed Karting at Auto Club Speedway For Round 3 of The 2018 Season June 1-2
Friday, 25 May 2018 11:40

Local favorite Billy Musgrave leads the S1/S2 field at last years Calspeed event. (Photo: DromoPhotos.com)

After a small hiatus for national competition, Superkarts! USA’s flagship regional program, the CaliforniaProKart Challenge, returns to action at the Auto Club Speedway in Fontana for Round 3 of the 2018 championship on June 1-2. The popular venue also plays host to the Los Angeles Kart Club (LAKC) and is among a favorite of local competitors, thanks in part to its proximity and wide variety of configurations.
 
While the 2018 championship is only two races in, some early season favorites look poised to make their bid for the regional title. National #2 Billy Musgravecontinues to be the man to beat in the Mad Old Nut / Mad Croc USA Pro S1 category. The MRC factory pilot has not put a wheel wrong since his SuperNationals 21 victory. But Matias Podboj and Brian Keck continue to give chase and will no doubt look to upset the PKC points leader. Musgrave runs well at the paved CalSpeed circuit, so the two will have their work cut out for them.
Read more...
 
Musgrave and Drew Tame Streets of Willow During California ProKart Challenge Weekend
Friday, 06 April 2018 14:28

Billy Musgrave scored his second straight victory in S1 for 2018 (Photo: DromoPhotos.com)

The California ProKart Challenge allowed its racers to stretch out their karting machines for the second round of the 2018 season. On March 30-31, the Superkarts! USA flagship regional program visited the Streets of Willow course at the Willow Springs International Raceway facility in Rosamond, California. The 1.6-mile course – with a reduced layout for X30 Junior and Swift drivers – took racers away from the normal karting track and onto a road course, reaching the highest speeds of the season. The 12 categories were put together into four race groups on the day, sticking with the same qualifying, two heats, and main event format. A number of classes were swept on the day, while others went down to the wire.

All six Stock Honda categories took to the Streets of Willow circuit in a combined race group throughout the day, putting 50 karts on track to make every session a busy one. At the front of the field all day was Billy Musgrave. The four-time series champion and SuperNationals 21 victor swept the Mad Old Nut S1 Pro Stock Honda class, but it was not easy. Musgrave cleared the entire race group by half a second with a 1:15.311-lap time, ahead of S1 rookie Rory van der Steur and Josh Lane, making his return to the California PKC. It was Brian Keck that put the pressure on Musgrave in Heat #1, stealing the lead for four laps until Billy retook the position and the win. Heat #2 saw van der Steur leading four laps before Musgrave resumed the spot – right before a red flag and restart cut the session short. Musgrave and van der Steur were able to get away from everyone in the 14-lap Final, making it a duel for the victory. Rory led the majority of the race, with Musgrave leading the final two circuits. At the line, the two were separated by 76 thousandths of a second at roughly 80mph. Lane was on the podium in third to cap off his return to the seat, while Matias Podboj and Peter Abba completed the top-five.
Read more...
 
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.
 


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