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Since it appears to have a preference for mountainous terrain, I would assume its range would extend across the Rockies. Obviously in the past hundred or so years travel from there to the Rubies unnoticed would be tough, but assuming the population of these animals was once more widespread it's not too far flung for there to be a population there. 

As for it being a ground sloth, while the body and hands certainly fit the description in these illustrations, there are a couple hang-ups. Ground sloths from the fossils we have of them are generally believed to have been fairly heavy-set, stocky creatures, which seems at odds with the descriptions of it being thin. This is especially true for the head of what is described, as if you look at ground sloth fossils you'll see they have a rather short and compact skull, clashing with the more badger-like snout that's kept in common across these descriptions.
gpt
>This is especially true for the head of what is described, as if you look at ground sloth fossils you'll see they have a rather short and compact skull, clashing with the more badger-like snout that's kept in common across these descriptions.
Sloths are closely related to anteaters which have a skull that fits the description. It could be an evolutionary product halfway between sloths and anteaters that evolved to dig insects out of trees and rocky crevices (although that's making a big assumption about its feeding habits based off the shape of its skull).
But I don't think we can assume any more until we learn more about its feeding habits. That said, there's definitely something out there, about 6 feet high at the shoulder and weighing probably 600lbs-1,000lbs, so it would need a large calorie source and living in mountainous terrain it would pretty much have to be omnivorous I think (but I'm speculating, I'm not a biologist). Giant ground sloths either lived in jungles in SA or mixed-foliage plains in NA and mountains certainly are not as fertile.
My avocado herbologist friend (avocados evolved symbiotically with giant ground sloths and it's only because of human cultivation that avocados didn't go extinct apparently) suggested that an animal that large would need a fat-rich diet and would largely be solitary to prevent competition.