You know you’re in the right area when you see a large post like this that has been rubbed by the antlers of a very large Whitetail Buck.
I could see this Buck rub from one of the paved trails at the Sequoyah National Wildlife Refuge in Oklahoma.
Whitetail Buck Facts
Bucks rub trees and shrubs with their antlers and head during the breeding season, possibly transferring scent from the forehead glands to the tree, leaving a scent other deer can detect.
Sign-post marking (scrapes and rubs) are a very obvious way that white-tailed deer communicate. Although bucks do most of the marking, does visit these locations often. To make a rub, a buck will use its antlers to strip the bark off of small diameter trees, helping to mark his territory and polish his antlers. (Wikipedia)