35window, when I was a kid the first few years I started going, starting in '58 or so, it was held at the National Western Stock show at the old arena area. It was held there until the Colosieum was built in downtown Denver then the show moved.
If memory serves it was "The Sabres of Denver Thanksgiving car show". We always went to the show until I was 18. After that life got in the way, family moved you know the drill. I went a couple of different times over the years but now we are back here in Colorado we are trying to make it a family guys thing with the older nephews and grand sons.