I can't say for certain there isn't an aircraft boneyard in Nevada, but if there is I have never heard about it, and I probably would have as I have been an aviation enthusiast for over 50 years.

The Davis-Monthan AFB boneyard (AMARC) has not generally been open to the public, but tours are reportedly now available through the nearby Pima Air Museum, which also has a large collection of aircraft, large and small including some "one of a kinds," lots of old round-motored heavies including an "Air Force One" that Kennedy used and some very rare jet-age aircraft (including a Blackbird). For Pima, try this link. I had trouble getting their site to load today, but I think this may be a temporary problem. If it doesn't work for you, you could search for Pima Air Museum and come up with lots of other links with information.

This is nowhere near US50 or Nevada though.