IAC maintains a Regional contest calendar.
This calendar is updated starting early in the year, as IAC chapters confirm contest dates.
Some California contests of note include:
Two sponsored by Chapter 36, the San Diego "Hammerheads", in April (Hammerhead Roundup) and October (Akrofest) at the Borrego Airport.
Chapter 38 in northern California has scheduled the Coalingua G Fest in May.
Chapter 26 sponsors a contest, not yet on the IAC calendar, at Fox Field.
The two Chapter 36 contests are noteworthy because Sunrise Aviation, a flight school at John Wayne-Orange Country Airport (KSNA) has an Extra 300, a Pitts S2B, a SuperD, and two Decathlons. Aerobatic pilots who check out in these airplanes can take them to the contest (usually arranging to share ferry costs to Borrego from John Wayne). An aerobatic camp is often available days before the contest. Contact Sunrise Aviation for more information.