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Next ProKart Challenge Event


PRE-ENTRY OPEN NOW!
Closes Tues, Aug 19 at 11:59 PM

Round 5 - SONOMA RACEWAY August 23-24, 2025
Sonoma Raceway Karting Center
29355 Arnold Dr,
Sonoma, CA 95476
sonomaraceway.com
Google Maps
There will be a Sunoco vendor pumping fuel.

SuperNationals 28


PRE-ENTRY OPEN NOW!!!

WAITLIST FAQ

Supernationals 28 November 12-16, 2025
Las Vegas Motor Speedway
7000 Las Vegas Blvd N
Las Vegas, NV 89115
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PACKAGES & SHIPMENTS

Event Bulletin

  • 8/5 4:00 PM - CAPACITY UPDATE - Micro Swift is now SOLD OUT and waitlisting. We should have news on which class(es) we will be expanding by end of the week.
  • 8/5 4:00 PM - SOLD OUT CLASSES - KA100 Senior, KA100 Master, Micro Swift, Mini Swift, X30 Junior, and Pro Shifter.
  • 8/3 12:00 PM - CAPACITY UPDATE - KA100 Master and Pro Shifter are now sold out at 44. Micro Swift has less then 5 spots left.
  • 8/1 1:20 PM - TEMP NUMBERS - If you have or can only pick a 1000 number in KA100 Senior, that is only a TEMPORARY number.  We will issue you a 900 number later on.
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 Important News

EKN Trackside: 2018 Superkarts! USA Pro Tour SpringNationals – Preview Part 1
Wednesday, 02 May 2018 00:00

AJ Myers leads the S1 title chase heading into Phoenix (Photo: EKN)

Three drivers stood out at the WinterNationals in the S1 Pro Stock Honda division. Austin Garrison (J3 / CompKart) shocked the field after a wild opening few laps to escape with the lead and go on to score his first class victory. The former S2 champion could not find the magic again on Sunday, with former Pro Tour winner AJ Myers sweeping the day toward victory. Myers (TB Kart USA) ran second to Garrison on Sunday, giving the Florida driver the championship lead, ahead of 2017 SKUSA SuperNationals winner Billy Musgrave by 40 points. Musgrave (MRC / Aluminos) stood on the podium both days at NOLA to put him second in the standings, and currently holds the top spot in the EKN Driver Rankings Powered by Bell Racing USA. The four-time California ProKart Challenge champion is the only winner from the last two SKUSA Pro Tour events at PKRA to be in this year’s field. Two others who competed in both PKRA events in 2015 and 2016 were Kolton Griffin (MRC / Aluminos) and Brian Keck (CRG). Read full story on eKartingNews.com
 
Ninth Annual Superkarts! USA Pro Tour SpringNationals Set for Phoenix
Thursday, 26 April 2018 11:58

Superkarts! USA Pro Tour heads to Phoenix Kart Racing Association facility for the 2018 SpringNationals (Photo: On Track Promotions - otp.ca)

For the fourth time in Superkarts! USA history, the SKUSA Pro Tour is set to travel to the Phoenix Kart Racing Association facility. The ‘Formula K Raceway’ in Glendale, Arizona is set to host the organization on May 4-6 for the second event of the 2018 season – the SKUSA Pro Tour SpringNationals. The six-round championship program that is the 2018 SKUSA Pro Tour began at the NOLA Motorsports Park in Avondale, Louisiana in March at the WinterNationals. Over 200 drivers took part in the 2018 opening event, with similar numbers expected for Arizona. The middle two rounds of the series are set for the PKRA facility, where the organization has visited three times in the previous eight years of the SKUSA Pro Tour (2012, 2015, and 2016).
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.
 
California Prokart Challenge Resumes At Streets Of Willow
Friday, 23 March 2018 09:32

California ProKart Challenge returns to the Streets of Willow road course on March 30-31 (Photo: DromoPhotos.com)

The 2018 season for the California ProKart Challenge began the first weekend of February. Now eight weeks later, the Superkarts! USA flagship regional program resumes with an exciting second event of the season. Competitors from the West Coast as well as across the United States are preparing to head to Rosamond, California and attack the Streets of Willow circuit. The famed course is among the most unique, as the road racing circuit is the only one to feature a distance of over 1-mile on the SKUSA 2018 calendar. Drafting, partners and playing chess at nearly 100mph sums up what the action will be like throughout the weekend at Streets.

The track configuration puts the full course in the clockwise direction (aka ‘up the hill’) at 1.6 miles for the X30 Senior, X30 Master and all Stock Honda categories. The X30 Junior, Mini Swift and Micro Swift divisions will utilize a shorter 1.1-mile layout.
Read more...
 


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