I know another thread was started, but it was a little while back and this post has all the details including discount info-

tl;dr- Discounted track time / half day, discounted Auto-X, cars + coffee + car show, parade laps on track for regular cars @Sonoma Raceway 8/26-8/27.
The Shelby club is running their annual Mini Nationals again this year at Sonoma Raceway August 26th and 27th. All vehicles are welcome and it has never been a single mark event (because Miata). This year in addition to the multi run group open track, the club is also offering a separate Autocross run by a partner that specializes in Autocross events. Throw in a cars n coffee + car show, and there really is quite a bit to take part in. Participant registrations are off a little and car counts are lower so the club is waving the $20 club membership ask for registering for track or Auto-X (refunded after reg due to a bug in Motorsports Reg process). There are also half day track options and an offer of noon Parade laps around the track for drivers (and passengers of all ages) during lunch not requiring reg for track time or Auto-X.

Throw me a note if you register from this post and I’ll treat you to Saturday or Sunday lunch from whatever I bring with me to throw on the grill. Brats, Italian sausage, burgers, hot dogs- not sure yet but happy to throw one on for ya.

Registration link:
More Event Information: