SONOMA, Calif. (Aug. 14, 2018) – Sonoma Raceway and key figures from the founding of then-Sears Point Raceway came together today to mark the 50th anniversary of the facility’s ceremonial groundbreaking, which was celebrated on Aug. 14, 1968. Sonoma Raceway President and General Manager Steve Page, Gordon Blumenfeld, a member of the raceway’s founding group, and Ken…