The Dihedrals are a cluster of vertical walls and aretes that climbers absolutely love. The Center Dihedrals feature some of the most popular routes at Smith Rock, and the routes have exciting vertical knobs and edges. Temperatures can get pretty toasty during the summer months, and it can also get below freezing during the winter months. Be sure to bring some cash for a $3 dollar parking permit, or you can purchase an annual pass for $25. There's also a roadside campground just before you get to the main parking area.