Schedule
Both classes did not participate together in some events. Races marked with Both had both classes on track at the same time.
| Rnd | Race | Length | Class | Circuit | Date |
|---|---|---|---|---|---|
| 1 | 24 Hours of Daytona | 24 Hours | Both | Daytona International Speedway | February 5 February 6 |
| 2 | 12 Hours of Sebring | 12 Hours | Both | Sebring International Raceway | March 19 |
| 3 | WQXI Road Atlanta 100 | 100 mi (160 km) | Both | Road Atlanta | April 17 |
| 4 | Monterey Triple Crown | 100 mi (160 km) | Both | Laguna Seca Raceway | May 1 |
| 5 | Mid-America 100 | 100 mi (160 km) | Both | Mid-America Raceway | May 15 |
| 6 | Coca-Cola 350 | 100 mi (160 km) | Both | Lime Rock Park | May 30 |
| 7 | Mid-Ohio Twin 200 | 100 mi (160 km) | Both | Mid-Ohio Sports Car Course | June 5 |
| 8 | Pepsi Grand Prix | 100 mi (160 km) | Both | Brainerd International Raceway | June 19 |
| 9 | Paul Revere 250 | 250 mi (400 km) | Both | Daytona International Speedway | July 4 |
| 10 | Hallett Grand Prix | 1 Hour | GTU | Hallett Motor Racing Circuit | July 24 |
| 11 | Sears Point Grand Prix | 100 mi (160 km) | GTO | Sears Point International Raceway | July 31 |
| 75 mi (121 km) | GTU | ||||
| 12 | Pocono Carquest Twin Grand Prix | 100 mi (160 km) | Both | Pocono International Raceway | August 14 |
| 13 | Mid-Ohio Twin 3 Hours | 3 Hours | Both | Mid-Ohio Sports Car Course | August 28 |
| 14 | Labor Day Race | 100 mi (160 km) | GTU | Road Atlanta | September 5 |
| 100 mi (160 km) | GTO | ||||
| 15 | Shasta Monterey Grand Prix | 100 mi (160 km) | Both | Laguna Seca Raceway | October 9 |
| 16 | Daytona Finale 250 | 250 mi (400 km) | Both | Daytona International Speedway | October 26 |
Read more about this topic: 1977 IMSA GT Championship Season