10 mile loop altogether. Awesome and great experience for a sunny June day hike.
What I did was start my hike at State park managing building to South Prong bridge, to North Prong bridge, to Cascade Falls and then to the end Potomac river and Cliffs. I went past the overlook but it goes off into a old cabin and a old gravel road, that's where I turned around then hiked the Lostland Run road back. Half way up the road there was a trail called CCC Ponds, it's about a mile in and you'll come up to a sign telling the history and the abandoned ponds. From what I can remember it said the ponds were man made, attempting to make a fish hatchery with a valve gate system to open and stock the local rivers. Sadly the ponds were abandoned in 1937 or so after a accident from a mine leaking acid into the north prong creek . It also shows a small map of the ponds and where the water valve gate was at.
Be prepared to cross a couple small creeks were you'll get your feet wet. Bring extra clothing or swim wear for at the end of at Potomac River for cooling off and swimming. I suggest bringing lunch for after the swim and enjoy nature.
A hike through a hemlock-laurel canyon, following Lostland Run route to the Potomac. There are stream crossings on footbridges, a waterfall, and many opportunities to view wildlife. You can lose your cares amid the hemlock and laurel along the swift Lostland Run. The trail crosses the run several times, and there are several scenic falls. Special considerations: In the first mile of the hike, there are two sections of rough and rocky terrain. They are passable by hikers of most abilities, but they make for slow going for a time with small children. water proof boot were a big help where there were no bridges.