Below is the complete race-day schedule for Riverhead on Saturday. The 2023 edition of the Islip 300 saw Matt Hirschman add a victory in the historic event to his long list of accolades.

He emerged victorious after beating Matt Hirschman in the final laps to the checkered flag at the 0.526-mile oval track. The 36-year-old New York native dominated the majority of the race and ...