NASCAR O'Reilly Auto Parts Series at Circuit of the Americas
| NASCAR O'Reilly Auto Parts Series | |
|---|---|
| Venue | Circuit of the Americas |
| Location | Austin, Texas |
| Corporate sponsor | Focused Health |
| First race | 2021 |
| Distance | 156 mi (251 km) |
| Laps | 65 First 2 stages: 20 each Stage 3: 25 |
| Previous names | Pit Boss 250 (2021–2023) |
| Most wins (driver) | A. J. Allmendinger (2) |
| Most wins (team) | Kaulig Racing, JR Motorsports (2) |
| Most wins (manufacturer) | Chevrolet (5) |
| Circuit information | |
| Surface | Asphalt |
| Length | 2.400 mi (3.862 km) |
| Turns | 18 |
Stock car races in the NASCAR O'Reilly Auto Parts Series has been held at Circuit of the Americas in Austin, Texas as a companion to the Cup race at the track since 2021. The 250 kilometres (160 mi) race is currently known as Focused Health 250 for sponsorship reasons. Shane van Gisbergen is the defending winner.