Cali Track Days is the home of the $100 track day in both Northern and Southern California. The 2019 schedule is packed with dates on both ends of the state. 
Begin press release:

Cali Track Days announces their 2019 season schedule for Northern and Southern California.
In June 2018, the passion project now known as Cali Track Days was formally introduced the motorcycle world. A new, affordably priced track day provider with the focus to drive motorcyclist to sharpen their skills on a race track rather than canyon roads.
The idea of a $100 track day with limited size groups, coaching, classes and little extras such as coffee and pastries took off in Northern and Southern California. In only half a season, Cali Track Days managed to hold a total of five sold out events split between Buttonwillow Raceway and Thunderhill Raceway while gathering a sizable following on social media with it?s unique marketing approach. Cali Track Days will be hosting a total of ten events split up between Thunderhill Raceway and Buttonwillow Raceway in 2019.
March 11th – Buttonwillow Raceway
April 1st – Thunderhill Raceway East
April 29th – Buttonwillow Raceway
May 20th – Buttonwillow Raceway
June 3rd – Buttonwillow Raceway
July 1st – Thunderhill Raceway East
July 29th – Buttonwillow Raceway
September 16th – Thunderhill Raceway East
October 7th – Buttonwillow Raceway
November 4th – Thunderhill Raceway East
All Cali Track Days instructo...