The Yellow Loop Trail in Deer Lakes Park, Tarentum, PA, is one of the best hiking trails there. It's a 2 mile loop that leads along West Deer Lake and back into the woods.
There are a couple of more open 'scenic' areas, but it's nothing too special. Just a really nice relaxing hike through the woods.
Explore our Appalachian Trail (AT) section hikesMt. Katahdin, Maine
Explore our Pacific Crest Trail (PCT) section hikesJMT/PCT Duck Pass Trailhead to Vermillion Valley, California