COLUMBIA RIVER GORGE, Ore.-Ever wondered why trail signs are now mounted on heavy duty, pressure treated wooden posts, and not simply nailed to a tree?
Trail wayfinder signs in the past were simply nailed to a tree. As the years go by, the tree trunk's diameter expands and wraps itself around the sign.
Another problem with tree-mounted signs is the height that it is mounted. On some trees, signs mounted at eye level around six feet would eventually end up much higher in the air over the years, making it easy for hikers to miss.