I have no personal experience of Sasquatch, or Bigfoot, although in my newspaper days I interviewed a man living two counties north of here who swore he had seen a couple of them walking in the snow near his house. He photographed the three-toed (?) tracks: they went down a road . . . and ended suddenly.
Still, I have problems imagining a hairy primate that could live year-round in the Rockies, unless it hibernated like a bear. On the other hand, one of the best Sasquatch books (set in Washington state, however), was written by a respected naturalist, Robert Michael Pyle: Where Bigfoot Walks: Crossing the Dark Divide.
It in turn inspired Joel Weishaus' digital project, "The Silence of Sasquatch: Toeing the Dark Divide," which is worth a look.