2025 Southern Illinois 100
| Race details | |||
|---|---|---|---|
| Race 16 of 20 of the 2025 ARCA Menards Series | |||
| Date | August 31, 2025 | ||
| Official name | 45th Annual Southern Illinois 100 | ||
| Location | DuQuoin State Fairgrounds Racetrack in Du Quoin, Illinois | ||
| Course | Permanent racing facility | ||
| Course length | 1 miles (1.6 km) | ||
| Distance | 104 laps, 104 mi (167 km) | ||
| Scheduled distance | 100 laps, 100 mi (160 km) | ||
| Average speed | 70.139 mph (112.878 km/h) | ||
| Pole position | |||
| Driver | Venturini Motorsports | ||
| Time | 34.072 | ||
| Most laps led | |||
| Driver | Brent Crews | Nitro Motorsports | |
| Laps | 54 | ||
| Winner | |||
| No. 28 | Brenden Queen | Pinnacle Racing Group | |
| Television in the United States | |||
| Network | FS1 | ||
| Announcers | Eric Brennan and Phil Parsons | ||
| Radio in the United States | |||
| Radio | ARCA Racing Network | ||
The 2025 Southern Illinois 100 was the 16th stock car race of the 2025 ARCA Menards Series season, and the 45th iteration of the event. The race was held on Sunday, August 31, 2025, at the DuQuoin State Fairgrounds Racetrack in Du Quoin, Illinois, a 1-mile (1.6 km) permanent oval-shaped dirt track. The race was contested over 104 laps, extended from 100 laps due to late-race restart. In a wild race, Brenden Queen, driving for Pinnacle Racing Group, would take advantage of a late restart, and led the final 22 laps of the event to earn his sixth career ARCA Menards Series win. Brent Crews, the dominant driver of the race, was involved in a late race wreck involving Alex Clubb with eight laps to go, ending his chances at sweeping both dirt races. He retired from the race and was credited with a 15th place finish. To fill out the podium, pole-sitter Lawless Alan, driving for Venturini Motorsports, and Kelly Kovski, driving for his own team, Kelly Kovski Racing, would finish 2nd and 3rd, respectively.