Ralph Mulford drove a Mason to victory in a 200 mile race on the 1 mile dirt Columbus Driving Park in Columbus, OH. Eddie Rickenbacker made his AAA debut.
Pete DePaolo drove a Miller to victory in the 200 mile AAA Championship race on the 1.25 mile board Rockingham Speedway in Salem, NH. Wade Morton drove an Auburn to victory in a 100 mile Stock Car race.
Pat O'Connor won the Pee Dee 200 USAC Championship race on the 1.366-mile paved oval Darlington Raceway in Darlington, SC. Jack Turner was second followed by Johnny Boyd, George Amick and Pat Flaherty.
"Fireball" Roberts drove Banjo Matthews' Pontiac to victory in the NASCAR Grand National Firecracker 250 at Daytona International Speedway. It was Roberts 3rd win of the season, all on the 2.5 mile Daytona tri-oval.
Gary Bettenhausen won the USAC Michigan Twin 200s Indy Car race on the 2-mile paved oval Michigan International Speedway in Brooklyn, MI. Bobby Unser was second followed by Johnny Rutherford, Mike Mosley and Jim Malloy. A.J. Foyt won the 200 Mile USAC Stock Car race.
Bobby Rahal scored the first CART victory of his career by winning the inaugural Cleveland Grand Prix on a temporary course at the Burke-Lakefront Airport in Cleveland, OH.
Richard Petty won the NASCAR Winston Cup Pepsi Firecracker 400 over Harry Gant at the Daytona International Speedway, Daytona, FL.