I'm sure you are right. That was on a lease I was part of some years back. The property was sold ~2018 so I've not been on it since. That lease was loaded with young chestnut and scrub oaks so protecting that one wasn't really on my radar.
It seemed like once they started, they would rub on it any time of the year, even though the bait was only there in summertime (pre-cwd concerns then but still no bait near hunting season in PA). I have pics of them rubbing right out of hibernation in the spring and into mid December. It's big woods with no ag, and the "plot" could never establish anything; anything green that made it to 6" was promptly mowed down.
bears will again use a tree once rubbed to be a marking post of the likes, , so they will rub it almost every time they go pass it, and as other bears pass it they will scent mark it with there scent
its sort of how bears keep tabs on each other
I have a LOT of bears in my area, I average about 17-20 different one every yr in my back yard that I can ID, and I have like tree's in my yard they will make up every yr, its a territory thing for them
at different times of the yr they will be sending different signals, from mating season to just bigger males stating claim to an area!
bears of all ages and sex will mark certain tree's
if you ever find one they use
its amazing to monitor them with a camera, as its very very common for other animals to start scent marking the same tree, from coyotes to foxes to even different deer and where other species live like wolves , elk , moose, they too seem to get attracted to the same tree a bears starts to mark up!



