BTW - Any chance you were close to the midnight race club around Denver in the '90s? Retired F1, Nascar, Can-Am, etc. drivers would get together and race on I25, 470, and so on. It only became public around '96 or so when there was a very high speed head-on with a bridge abutment. Wonder what those guys are doing now.
I did not live in Colorado until 1998. I had a 1986 Porsche Turbo, but did not know of this racing group.