On our adventure to the Southwest last fall we stopped at a truckstop we had heard about called Deno’s 6 & 85 near Commerce City, Colorado.
The place is "well worn" in that the furniture is rickety, and the floors were less than sanitary. Also, the restrooms were TERRIBLE!
But the steaks were just outstanding and reasonably priced. Sides were typical diner food: canned corn, mashed potatoes and gravy, etc. The salads were simple but very good.
It appeared that besides truckers, there were a lot of locals and tourists (judging by the license plates) eating there. We had steaks, but noticed that a neighboring diner’s burger looked fantastic.
I wouldn’t go too far out of my way to find it, but if passing through, Deno’s offers up some good slabs of beef and cold beer.