Where Was Ontario Motor Speedway?
Not Auto Club Speedway
Many people confuse what was Ontario Motor Speedway (The Big “O” racetrack) with the newer California Speedway only two miles away in Fontana. The Fontana racetrack, known as Auto Club Speedway or California Speedway was built 17 years after the last bits of Ontario Motor Speedway were torn down.
Where Ontario Motor Speedway Was, And What Is There Now:
The speedway was bordered on the north by 4th Avenue (then referred to as San Bernardino Avenue), on the south by Interstate 10, the west by Haven Avenue, and the east by Milliken Avenue, which still has the eastward curve needed to make room for turn 1 and turn 2 of the racetrack. Milliken Avenue is one of (maybe the only) street with curves like this in the entire city.
Aerial Views of Ontario Speedway
Ontario Motor Speedway Location Today (2013)
Ontario Motor Speedwway Track Layout (Click for larger, high-res image)
Overlay of the racetrack on today's map: (click for larger image)
Then (1976) and now (2013)