Prelude, Super Nationals start times adjusted

BOONE, Iowa (Aug. 29, 2025) – Due to the increased number of early registrations, officials have elected to move up the daily start times for the Speedway Motors IMCA Super Nationals fueled by Casey’s. 

The change will be in effect for all eight days of Super Nationals, including this weekend’s NAPA Auto Parts Prelude to the Super Nationals. 

All times that were previously published will now be moved up one hour. This includes ticket gate, pit gate, registration/check-in and start times. All event times have been updated on each day’s schedule listing on the MyRacePass app under IMCA Super Nationals.