The Pine Hollow Trail at Beechwood Farms Nature Reserve, Pittsburgh, PA, is a moderate 1 mile loop hike through the park.
This trail can be found on the south western side of the park and connects in two places along the Meadowview Trail. This is essentially a loop trail since the beginning and ends are so close to each other.
About half way through the trail is a really nice waterfall, about 10 feet high - you can't miss it if you listen for it. The waterfall makes this probably the best hiking trail at Beechwood Farms Nature Reserve.