Kalender NASCAR O’Reilly Series 2026
| Lauf | Datum | Strecke |
| 1 | 14. Februar | Daytona International Speedway |
| 2 | 21. Februar | Atlanta Motor Speedway |
| 3 | 28. Februar | Circuit of the Americas |
| 4 | 07. März | Phoenix Raceway |
| 5 | 14. März | Las Vegas Motor Speedway |
| 6 | 21. März | Darlington Raceway |
| 7 | 28. März | Martinsville Speedway |
| 8 | 04. April | Rockingham Speedway |
| 9 | 11. April | Bristol Motor Speedway |
| 10 | 18. April | Kansas Speedway |
| 11 | 25. April | Talladega Superspeedway |
| 12 | 02. Mai | Texas Motor Speedway |
| 13 | 09. Mai | Watkins Glen International |
| 14 | 16. Mai | Dover Motor Speedway |
| 15 | 23. Mai | Charlotte Motor Speedway |
| 16 | 30. Mai | Nashville Superspeedway |
| 17 | 13. Juni | Pocono Raceway |
| 18 | 20. Juni | Qualcomm Circuit (San Diego) |
| 19 | 27. Juni | Sonoma Raceway |
| 20 | 04. Juli | Chicagoland Speedway |
| 21 | 11. Juli | EchoPark Speedway (Atlanta) |
| 22 | 25. Juli | Indianapolis Motor Speedway |
| 23 | 08. August | Iowa Speedway |
| 24 | 28. August | Daytona International Speedway |
| 25* | 05. September | Darlington Raceway (Chase) |
| 26* | 12. September | World Wide Technology Raceway (Chase) |
| 27* | 18. September | Bristol Motor Speedway (Chase) |
| 28* | 03. Oktober | Las Vegas Motor Speedway (Chase) |
| 29* | 10. Oktober | Charlotte Motor Speedway (Chase) |
| 30* | 17. Oktober | Phoenix Raceway (Chase) |
| 31* | 24. Oktober | Talladega Superspeedway (Chase) |
| 32* | 31. Oktober | Martinsville Speedway (Chase) |
| 33* | 07. November | Homestead–Miami Speedway (Chase) |
