>A common misconception is that grizzly bears, unlike black bears, cannot climb trees. While its long claws make climbing more difficult for a grizzly than for a black bear, a grizzly can get to you in a tree – it will more likely, however, be able to reach you before you reach the tree. http://www.fws.gov/mountain-prairie/species/mammals/grizzly/misunderstood_bear.pdf