Speed SF 2.5hrs Endurance Race Registration

Speedsf.com on Saturday, September 12, 2026 - Sunday, September 13, 2026 at Sonoma Raceway, Sonoma, CA - 2.5 hours Endurance Race - Round 2 9/12 - 9/13 (Sat - Sun) Sonoma Raceway Saturday: Practice and Qualifying Sunday: 2.5 hours Race Early Sign-up price: $400 (Regular price $550) The race format, regu...