42 is a rock solid number. I'm guessing the blue is supposed to be river impassible, but if you look most maps list these, I'd recommend you do the same.
Your torn hole/explosion/fallout area is obviously impassible but you may want to list it as well as many current maps would, but I wouldn't force you to.
1st - Change the fonts on the legend & Title.... Script in my opinion rarely works well for a list of territories and there value ... keep it simple and clean with a easy to read bold font
2nd - the map over all... while its not that bad it looks rough... tha mountains look awful and the borders seem too Thick...
http://geology.com/state-map/new-york.shtml....
check out the map of NYs topography... It shows exactly how the mountain ranges are in the state....
Colors seem too dark Lighten up the territories a little the background is good
Also Mountains don't have to be the only impassable... Forests, Lakes, Highways, Etc. ... Use a combination