Marmots and ground hogs are the same critter. They're a giant tree rat. Kind of odd to see one walking that high on its pins though.
No cat looks like that. Feral or otherwise.
I have been all over the US, and to Switzerland where they are quite celebrated, and I've never seen a marmot/groundhog rock/woodchuck with legs like that.
Is it possibly a winter weight, light-haired pacific fisher?
Saw one on the side of a tree one time. Never would have thought they would or could climb.
That one might be hold himself up off the snow. They dislike cold and wet and are a true hibernator. The fur is kind of thin.
I have shot 'em off snow banks in early spring though. Earliest one was on 3 March, long ago.
They do have a different name according to where you are. But they're all the same beastie.
I agree that it looks like a groundhog/marmot. But I have killed and trapped literally hundreds of those. Not once I have seen legs that would allow one to walk like that.
I tend to agree with the chupacabra statement. A hybrid possibly with the marmot. The op's picture the head is not like any marmot shown in the picture the head is distinct and round and not as oval and the ears stick out a lot, whereas you can hardly see them here.
Also as stated the legs are taller with the stomach not as pronounced as other marmots.