Janet Guthrie is a retired professional race car driver and the first woman to qualify and compete in both the Indianapolis 500 and the Daytona 500.
Guthrie was originally an aerospace engineer and after graduating from the University of Michigan, she worked with Republic Aviation. She began racing in 1963 on the SCCA circuit in a Jaguar XK 140 and by 1972, she was racing on a full-time basis.
In the 1976 World 600, Guthrie finished 15th, becoming the first woman to compete in a NASCAR Winston Cup superspeedway race. Guthrie would go on to compete in four more races that season. The following season, she competed in her first Daytona 500, finishing 12th when her car's engine blew two cylinders with ten laps to go. For the race, though, she still earned the honor of Top Rookie. Overall, Guthrie went on to compete in 33 races in NASCAR over four seasons. Her highest finish, sixth place at Bristol in 1977, is the best finish by a woman in a top-tier NASCAR race.
Guthrie qualified for and competed in the 1977 Indianapolis 500, but finished 29th with engine troubles. She would compete in two more Indy 500s, finishing as high as ninth in the 1978 race. Overall, she competed in 11 IndyCar events finishing as high as fifth.