Any Good trail rides in western washington?

Dos anyone know of are went on a good trail ride in western washington?
Im going to start taking my mare on trail in the winter and would like to know where there are good trails to go on .Thanks Guys(:

Take me, too!
Being near Olympia, and closer to the center of W. Wash. , you have many options. Some folks I spoke with yesterday were talking about some really amazing rides in the wilderness areas around Mt. Adams.