Series

What it is, which kart and classes, what a round costs, how to sign up the first time, what a typical weekend looks like, and who it suits. One page per league.

Which series in 2027?COTF, SKUSA and Tri-C side by side, the weekend they all collide, and the back-to-back stretches.
See the side-by-side →
Under the lights at the club round

Own-kart series (gas)

  • Tri-C Karters — SoCal’s club racing series for 50+ years. Willow Springs, Apex, Adams and Spring Mountain. Kid Kart through Masters.
  • AMP So Cal Sprinters — Adams’ in-house league (“AMP So Cal Sprinters”). Eight rounds, three at night. Kid Kart, Mini Swift, T4, shifters. $125.
  • AMP Winter League — Dec–Jan at Adams: three one-day rounds, each scored on its own. Kid Kart through Masters 4-cycle and shifters. $125.
  • COTF Club Series — New for 2027 at K1 Winchester: eight one-day rounds. Champions get a free COTF America entry.
  • SKUSA California ProKart Challenge — Six rounds: K1, Sonoma, Spring Mountain. $437 a round with tires. Regional.
  • Champions of the Future America — The IAME national series. 2027 West: K1, Sonoma, Utah, Spring Mountain, Final at K1. $868 a round.
  • SKUSA Pro Tour & SuperNationals — Three national weekends plus Vegas in November.
  • Challenge of the Americas — The West Coast Rotax series. K1 in February, then Arizona, Colorado, Sonoma.
  • CCKRA — Central Valley club: Buttonwillow, Bakersfield, Santa Maria, Fresno.
  • SMK Race Series — Spring Mountain’s own series, Pahrump NV. $300 includes Saturday practice and the Sunday race.
A pack of karts with the Winchester hills behind

Arrive and drive (they supply the kart, mostly electric)

  • K1 Speed Challenge GP — Monthly indoor rental league at Irvine, Anaheim and Carlsbad. Juniors from 48″. The cheapest racing there is.
  • K1 Circuit Semi-Pro Series — Monthly outdoor rental league at Winchester in electric race karts. Mini, Junior, Senior. $125 a round.
  • FAT Karting League — Electric spec karts, ages 5–17, at Willow Springs, Apex and Adams. Coached, well organized, a funded F4 seat at the top. Read our review.
  • Podium TKC — Rotax-powered Sodi karts, 13+. Apex, Willow Springs, Adams. The only gas arrive-and-drive in SoCal.
  • Rotax Racing Club California — Identical Birel ART / Rotax karts, $595 a round. Mostly NorCal.

Support the track photographers

Two photographers everyone in SoCal karting should know and support: Gisele and Andrew. They do amazing work, and they’re the reason we have more than a shaky phone video from the fence. Buy their photos, tag them, book them. That’s how they keep showing up, and how we all end up with the pictures that hold the memories.