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2025 Chevrolet Detroit Grand Prix Previous race results / Next race results                         Post IROC race number 5 of 11 Saturday, May 31, 2025 at The Raceway at Belle Isle, Belle Isle, MI 84 laps on a 2.350 mile street course (197.400 miles) Time of race: 1:40:46.658 Average speed: 117.53 mph Pole speed: 65.762 mph Cautions: 2 for 8 laps Margin of victory: 0.947 sec Attendance: n/a Lead changes: 5 Glossary    2025 IROC results   /   2025 standings

Pos St Class # Driver Team Sponsor Car Laps Status Led Pts

Fastest Lap: 66.641 seconds by Nick Tandy Caution flag breakdown: Condition From Lap To Lap # Of Laps Reason Free Pass 1 2 2     3 4 2     5 53 49     54 59 6     60 84 25       Percent of race run under caution: 9.5%             Average green flag run: 25.3 laps Lap leader breakdown: Leader From Lap To Lap # Of Laps   #93 1 26 26   #7 27 30 4   #10 31 39 9   #7 40 70 31   #10 71 80 10   #93 81 84 4