I just finished reading an article on wolf tracks and most likely you are right.. Although coyote tracks are normally smaller averaging 2 1/2" long while the wolf it stated averages 4 1/2 inches long.. So my guess now has become a coyote hybrid.. A higher cross with the wolf.. Perhaps one of those rarer kind in that can run up to a close eighty pounds.. Or it simply could be some one"s bear hound that has turned feral??