Yep, in the 60's. I had an HO set with a Ford GT and a 1/24 scale set with Ford GT and a La Cucaracha. There was a local track that must have been 10 to 12 lanes wide and my Mom would take me over to race there.
I had a Cox controller (I think) and it was always a blast on that big track that I'm guessing was 20' to 25' from the apex of one curve to the apex of the other end and about 12' at the widest point, though I don't truly know or even remember the actual shape. I just know it seemed huge and was fun!
David