Kalender Balap Watkins Glen Internasional 2021
| Tanggal | Racing Series diterjemahkan menjadi Seri Balap | Putaran | Nama Acara |
|---|---|---|---|
| 21 Mei - 23 Mei | Ferrari Challenge North America Selesai | Round 4 | |
| 24 Juni - 26 Juni | LSTNA - Lamborghini Super Trofeo Amerika Utara Selesai | Round 3 | |
| 24 Juni - 26 Juni | PCCNA - Piala Porsche Carrera Amerika Utara Selesai | Round 3 | |
| 25 Juni - 27 Juni | IMSA SportsCar Championship Selesai | Round 6 | Sahlen's Six Hours of The Glen |
| 1 Juli - 2 Juli | IMSA SportsCar Championship Selesai | Round 7 | IMSA WeatherTech 240 |
| 8 September - 12 September | Piala Porsche GT3 AS Selesai | Round 6 | |
| 17 September - 19 September | PSCNA - Porsche Sprint Challenge Amerika Utara Selesai | Round 7 |