My Mother's mother, even though they were farmer, would often drive into the the local cities to take in movies so as a youth I got to go to a lot of movies, including some in Twin Cities 60 miles away. (Grandma would take the train whose depot was only a few blocks from down twon Minneapolis, before Ma got married).
I got to see all of the big Epic movies of the late fifties into the early seventies.
I checked the Wiki and it took 200 miles of actual racing to put together the race for the film, it does not say how long the corners were but the straights were 1,500 feet long.