Now that's a big rub! I couldn't believe how many rubs we were seeing on our Montana trip back in 2002. Here's a link to a photo of one, I couldn't believe the height of the rub. I'm 6'1 and that tree was rubbed up to the top, nearly 10 feet.

[link]http://community.webshots.com/s/image2/2/87/19/51428719ogaODs_ph.jpg[/link]