Explorer's Guide 50 Hikes in Eastern Pennsylvania: From the Mason-Dixon Line to the Poconos and North Mountain (Fifth Edition)  (Explorer's 50 Hikes)
Tom Thwaites is a preeminent authority on hiking the trails of  Pennsylvania. An ardent trail builder and maintainer, he is a past  president of the Mid-State Trail Association and an active member of the  Keystone Trails Association, the Appalachian Trail Conference, the  Sierra Club, and the American Hiking Society. He is the author of  Explorer's Guide 50 Hikes in Western Pennsylvania, Explorer's Guide 50 Hikes in Central Pennsylvania, and Explorer's Guide 50 Hikes in Eastern Pennsylvania. He lives in State College, Pennsylvania.