Trip: Leavenworth - Clamshell Crag   Date: 4/13/2014   Trip Report: An ordinary Sunday cragging in Leavenworth was made noteworthy by the company of a 91 year old dirtbag.   Fred enjoying the sunshine: (photo credit D Palma)   Working the crux on Noisy Oyster (5.7) with a healthy top rope belay:   Shrimp Salad (5.7)   UP ROPE!   Mac wishing he had opposable thumbs so he could climb too. In dog years he’s over half a millennium younger than Fred.   Group p