The 25 Hours of Thunderhill Presented by Hawk Performance has been reinvented for 2023, with new classing, revised tire rules, scaled pricing by class, and new dates: November 10-11.
9:30 – 10:30 a.m. Mandatory Pre-Grid. Any car not gridded by 10:30 a.m. will start in the rear.
10:40 - 10:50 a.m. All personnel to stand near their cars. No working on cars. Military announcements, demonstrations,
etc. will take place.
10:50 - 10:55 a.m. Drivers belt in and prepare. Resume warming engines.
10:55 a.m. Five-minute board.
11:00 a.m. Pace car takes the track.
5:00 p.m. Sound limit warnings end and black flagging begins.
12:00 noon Checkered flag.
1:00 p.m. Awards ceremony on the first floor of the main building.