Group 1A:
Pre-1931 Sports Touring Cars
Group
2A: 1927-1946 Racing Cars
Group 3A:
1947-1955 Sports Racing Cars under 2000cc
Group 4A:
1947-1955 Sports Racing Cars over 2000cc
Group 5A:
1955-1961 Sports Racing Cars over 2500cc
Group 6A:
1963-1966 GT Cars over 2500cc
Group 2B:
1962-1966 GT Cars under 2500cc
Group 3B:
1956-1961 Sports Racing Cars under 2500cc
Group 4B:
1957-1963 Formula Cars
Group 5B:
1965-1971 World Championship Sports Cars
Group 7B:
1966-1972 Historic Trans-Am Cars
Paddock, Parking, and Displays