Yes, there are several Titan 1 missile silo complexes in Colorado, one is out by the old Lowery bombing range, another two headed east and the one in Deer trail. The are the first generation Titans that needed to be raised, then fueled, before launch (15 min). By the time they were complete they were obsolete. The Titan 2 came around, they could remain fueled and fired out of the depths of the silo saving precious time.
Scary and dangerous places to visit not to mention illegal trespassing. We had a club in the early 70's called the Association of Secret Silo Hunters Organized for Launch area Exploration and Search, or A.S.S.H.O.L.E.S. for short. They were fun back then, I don't think I'd do it now. Lots of missing flooring, cave-ins, water pools, deep drops and dark as hell. If any of you out there have been in those sites, and it sounds like at least one has, you are an honorary ASSHOLE. Congrats!!
The Atlas site in Weld Co. was a great visit. The county used it for record storage and civil defense after it was abandoned. The tour guy was kind of quirky but really knew the history of the site. Sorry to hear he has passed on. He had lost his co-worker in the tornado that went through there several years ago, he found him dead in the truck afterwards. Sad story.