Races 3&4 - SCCA SFR - Thunderhill Raceway Friday, May 5, 2017 8:00 AM 08:00 Sunday, May 7, 2017 5:00 PM 17:00 Google Calendar ICS Returning to Thunderhill Raceway in May the cooler temperatures give way to the heat changing the on track condition. Fresh from the SCCA Majors we will be ready to compete in Races 3 & 4 of the SCCA San Francisco Region Championship.