My last beagle Penny would jump on trees whenever there was something like a possum up in them. I thought it was so funny and didn't realize that beagles did that, lol. As a puppy she would climb up on our kitchen chairs and make herself at home. Once I found her lying on top of the table!
Abby, my beagle/treeing walker coonhound also jumps on the trees and jumped up our apple tree one day. She almost made it up there, too. I really don't want her doing it though because the tree is nearly dead and not in good shape.