Call the Sonoma race track.
Although the Kart track is located inside the Sonoma Raceway Grounds, it is best to contact Sims Raceway online or by phone. Sims Raceway is who operates the Kart track. Kobe, Jeff, Mike are all awesome!!
Definitely check out their website, theres lots of information on it for all kinds of events
I'm sorry I don't know the operations you might want to give him a call or look on their website
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