1973 / USAC National Championship Trail
Apr
7
1973 USAC Texas 200
Texas World Speedway
Apr
15
1973 USAC Trentonian Split 150 (Race 1)
Trenton Speedway
Apr
16
1973 USAC Trentonian Split 150 (Race 2)
Trenton Speedway
May
30
1973 USAC Indianapolis 500
Indianapolis Motor Speedway
Jun
10
1973 USAC Rex Mays 150
The Milwaukee Mile Speedway
Jul
1
1973 USAC Schaefer 500
Pocono Raceway
Jul
15
1973 USAC Michigan 200
Michigan International Speedway
Aug
12
1973 USAC Tony Bettenhausen 200
The Milwaukee Mile Speedway
Aug
26
1973 USAC Ontario 100 (Race 1)
Ontario Motor Speedway
Aug
27
1973 USAC Ontario 100 (Race 2)
Ontario Motor Speedway
Sep
2
1973 USAC California 500
Ontario Motor Speedway
Sep
16
1973 USAC Michigan Twin 125S (Race 1)
Michigan International Speedway
Sep
17
1973 USAC Michigan Twin 125S (Race 2)
Michigan International Speedway
Sep
23
1973 USAC Trenton 200
Trenton Speedway
Oct
6
1973 USAC College Station 200
Texas World Speedway
Nov
3
1973 USAC Arizona 150
Phoenix International Raceway