The 2023 Grant Park 220 was a NASCAR Cup Series race held on July 2, 2023, at the Chicago Street Course in Chicago, Illinois. Originally scheduled for 100 laps, the race was shortened to originally 75 laps due to darkness before being extended to 78 laps due to an overtime finish on the 2.2-mile (3.5 km) street course. It was the 18th race of the 2023 NASCAR Cup Series season. It was the first street race contested for the series. The race was won by reigning Supercars champion Shane van Gisbergen, making his NASCAR debut. Report Background The Chicago Street Course is a 2.140 mi (3.444 km) street circuit located in the city of Chicago, Illinois, United States. It hosts the NASCAR Cup Series and NASCAR Xfinity Series. The track was initially a conceptual track on iRacing made for the eNASCAR iRacing Pro Invitational Series in 2021. The track for the actual race in 2023 ended up being the exact same layout as the version used in 2021 for the eNASCAR iRacing Pro Invitational Series. The start/finish line is located on South Columbus Drive in front of Buckingham Fountain in Grant Park...