Kalendar Perlumbaan Antarabangsa Watkins Glen 2021
| Tarikh | Siri Perlumbaan | Bulatan | Nama Acara |
|---|---|---|---|
| 24 Jun - 26 Jun | Lamborghini Super Trofeo Amerika Utara Selesai | Round 3 | |
| 24 Jun - 26 Jun | Piala Porsche Carrera Amerika Utara Selesai | Round 3 | |
| 25 Jun - 27 Jun | IMSA SportsCar Championship Selesai | Round 6 | Sahlen's Six Hours of The Glen |
| 1 Julai - 2 Julai | IMSA SportsCar Championship Selesai | Round 7 | IMSA WeatherTech 240 |
| 8 September - 12 September | Piala Porsche GT3 Piala Amerika Syarikat Selesai | Round 6 | |
| 17 September - 19 September | PSCNA - Cabaran Porsche Sprint Amerika Utara Selesai | Round 7 |