8 of the 10 go-kart venues Go Karting USA tracks in North Carolina host birthday parties, based on what each venue publishes and what visitors describe. They're spread across 2 metro areas, so most of the state is within a reasonable drive of one.
Party bookings work differently from walk-in racing: expect a reserved room or area, a set number of races per guest, and a deposit. Weekend afternoon slots go first, so start calling two to three weeks out — and confirm the height rule for the youngest guests before invitations go out, since it varies venue to venue.
Jungle Rapids Go Karts, RushHour Karting Garner, Victory Lane Indoor Karting and 5 more — all listed below with ratings and locations.
Charlotte (4), Raleigh (1).
Two to three weeks for a weekend slot, more around school holidays. Party rooms and group race slots are reservation-based at essentially every venue, and afternoon weekend times fill first.
Go Karting USA lists 10 operating tracks in North Carolina — see the full North Carolina guide for all of them, not only birthday parties venues.