Points leaders Johnny O’Connell (Cadillac Racing CTS.V) and Jack Baldwin (Motul/StopTech/Foametix Porsche Cayman S) took the GT and GTS poles, with teammate Andy Pilgrim next to O’Connell on the front row and Brandon Davis (TRG-AMR Barrcuda Networks Aston Martin Vantage GT4) starting second in GTS. Round 11 and 12 winner and defending Sonoma champion Alex Figge (K-PAX Racing Volvo S60) started sixth, with teammate Randy Pobst third.
O’Connell stalled at the start, with Pobst’s all-wheel drive Volvo splitting the Cadillac’s to briefly take the lead before leaving the track himself early in Lap 1. O’Connell and Baldwin collided later in the lap damaging both vehicles. The leaders at the end of the first lap were Pilgrim, Figge, and Mike Skeen (CRP Racing Corvette).
Andy Lee (Best IT Racing Camaro) led GTS during Lap 2, followed by Davis. Davis passed Lee on the outside of Turn 1 during Lap 4. In the meantime, Pilgrim had built his lead over Figge to 3.7 sec. A full-course caution retightened the field during Lap 8, but Figge had to pull into the pits with an electrical problem. Figge’s retirement moved Skeen into P2 and Duncan Ende (Global Motorsports Group Audi R8) into third.
Within the first two laps of the restart Lee retook the GTS lead from Davis. Skeen was given a drive-through penalty for avoidable contact with Pobst on the restart, as Davis and Lee continued to battle in GTS during Lap 16 of 27. Davis moved in front of Lee a few laps later. Skeen refused to serve his penalty and was dropped from scoring, moving Ende up second and James Sofronas (GMG Audi R8) to P3.
This running order held at the end of the race, Pilgrim’s victory returning him to the championship hunt and Davis’ win the first for the TRG Aston, coming on the team’s home track. Lawson Aschenbach (Blackdog Racing Camaro) took third in GTS.