We frequently have claw marks on trees but they are generally only as far as the bear can reach from standing on the ground. Bears mark trees to establish boundaries to their territory and then urinate under the tree making it personal. The difference with this marked tree is that the claw marks are 25' up the tree. These are deep claw marks and something with considerable strength had to put them there. Mountain lions will climb trees to hang their kill or pounce on unsuspecting animals but I have not seen them mark trees before. This is a puzzle as to what may have marked this tree so high up and why.