Gary,
You're talking to a 70 year old guy about something he did 45 years ago... lol!
"CRS" brain is surely a factor here...
I am reasonably sure that drag strip was located in Commerce City, but have no information beyond that.
I also seem to remember that it was called "Rocky Mountain Dragway," but, I wouldn't bet the farm on that, either.
Thanks for your input.
Bill