This is a short, pretty easy hike on a well-used, well-maintained trail. It is used as a warm-up hike on some of my JTX hiking trips. The payoff is a nice waterfall view from the bottom of the trail; the only problem is that you pay for it AFTER you see it - the hike out is the uphill section. There are a bunch of other great hikes in Hickory Run - JTX guides several of the better ones. Hawk Falls is nice for people with kids - they play in the water near the falls, or who just want a quick hike.
Start at Route 534 parking area, near underpass where PA turnpike goes over. a few miles east of park office.
http://www.tripleblaze.com/trail.php?c=3&i=1351