100 lbs is pushing it, but I've seen one big coyote (may have been a coy-dog cross) that would have gone 65-70 lbs easy. On the road just outside Grand Lake Stream. I tried to unlimber my pistol at him (was riding shotgun with my pard) but he faded into the timber before I could get my sights on him. I checked where he was sitting: his head was level with growth that was 20-24 ins high. Beautiful coat, too. It's easy to see why deer are getting scarce in Northern Penobscot county: the coyotes are getting fat.
Pals who are guides in that area claim to have seen wolves, but those might be coy-dogs, too.
