Well, this is dated, as I first wrote this back in 2014, but ...
Old Slippery Skin's territory, circa 1810, covered approximately 900 square miles.
The Litchfield Monster's territory (possibly a hoax), circa 1895, covered approximately 145 square miles and locals reported that the main creature was part of a family of three.
If you go to the Northeast sightings, Vermont thread, my tract "Bigfoot in the Northeast" includes maps, breakdowns of territories, and an accounting of physically distinctive Bigfoots in many parts of eastern New York. For example, the vast majority of encounters in east-central New York occur on the roughly 900 square mile plateau/saddle that links the Taconic and Green Mountains - a saddle that happens to include Castleton, NY and Rutland, VT.
Unfortunately, while I've been out in the woods hiking/exploring more since then, I've had no more luck encountering anything - even bear. I'm not sure I'd encounter a cow at a dairy farm the way things go.