Kalendaryo ng Karera Watkins Glen International 2021
| Petsa | Serye ng Karera | Biluhaba | Pangalan ng Kaganapan |
|---|---|---|---|
| 21 Mayo - 23 Mayo | Ferrari Challenge North America Natapos | Round 4 | |
| 24 Hunyo - 26 Hunyo | LSTNA - Lamborghini Super Trofeo North America Natapos | Round 3 | |
| 24 Hunyo - 26 Hunyo | PCCNA - Porsche Carrera Cup North America Natapos | Round 3 | |
| 25 Hunyo - 27 Hunyo | IMSA SportsCar Championship Natapos | Round 6 | Sahlen's Six Hours of The Glen |
| 1 Hulyo - 2 Hulyo | IMSA SportsCar Championship Natapos | Round 7 | IMSA WeatherTech 240 |
| 8 Setyembre - 12 Setyembre | Porsche GT3 Cup Trophy USA Natapos | Round 6 | |
| 17 Setyembre - 19 Setyembre | PSCNA - Porsche Sprint Challenge North America Natapos | Round 7 |