It’s National Take a Hike Day, get outdoors for some fresh air, scenery and exercise at Fort Hunter Conservancy. Join Executive Director Brook Lenker of Keystone Trails Association for a strenuous, mountain hike ending with a picturesque view of the Susquehanna River. Four-legged, leashed friends are welcome too. This program is part of the Park Rx series of programs sponsored by Highmark Blue Shield. Pre-registration required.