The 1980 Trans-Am Series was the fifteenth running of the Sports Car Club of America's premier series. After several years of recovery from the decline of demand for muscle cars in the early seventies and the 1973 Oil Crisis, Trans Am evolved into a support series for the IMSA GT Championship, using vehicles that were also used in IMSA GT races. This would set the standard for the series thereafter, and this standard would be applied to the SCCA's World Challenge series many years later. Almost all of the races ran for approximately one hundred miles. Besides Watkins Glen, the only exception was Trois-Rivières (~75 miles).^[1]

Rd	Date	Circuit	Distance	Info
1	June 1	Hallett Motor Racing Circuit	100 miles (55 laps)
2	June 15	Portland International Raceway	100 miles (50 laps)
3	July 5	Watkins Glen International	6 hours (139 laps)	Also a round of the 1980 World Championship for Makes.
4	July 19	Road America	100 miles (25 laps)
5	August 10	Brainerd International Raceway	100 miles (33 laps)
6	August 23	Circuit Trois-Rivières	75 miles (35 laps)
7	September 7	Westwood Motorsport Park	100 miles (56 laps)
8	October 19	Laguna Seca Raceway	100 miles (52 laps)
9	October 25	Riverside International Raceway	100 miles (40 laps)

^[2]

Round	Circuit	Winning driver	Winning vehicle
1	Hallett	John Bauer	Porsche 911
2	Portland	Mark Pielsticker	Chevrolet Monza
3	Watkins Glen	John Bauer Larry Green	Porsche 911
4	Road America	Monte Sheldon	Porsche 911
5	Brainerd	John Bauer	Porsche 911
6	Trois-Rivières	Roy Woods	Chevrolet Camaro
7	Westwood	John Bauer	Porsche 911
8	Laguna Seca	Greg Pickett	Chevrolet Corvette
9	Riverside	Greg Pickett	Chevrolet Corvette

^[3]

1. John Bauer – 127 points
2. Greg Pickett – 76 points
3. Monte Sheldon – 72.5 points
4. Roy Woods – 71 points
5. Mark Pielsticker – 62 points