[5] The Susquehannock Trail System was founded in 1966 by William Fish Jr., who suggested creating an extensive backpacking loop through remote areas of Potter County by combining several pre-existing footpaths and logging roads or railroads, with some new connectors.

The STS begins with a mostly level hike on top of the Allegheny Plateau, and for about the first 2.5 miles it encounters several side trails that lead to Denton Hill State Park.

The STS passes an old dynamite shed, which has been converted into a small hiker's shelter, at 10.5 miles then reaches the valley of the West Branch of Pine Creek.

A secluded area called "Spook Hollow", due to its dense tree cover and cooler temperatures, is reached at 30.8 miles.

The trail descends very steeply, crosses a high footbridge called Ted's Truss (in honor of a state forester) over a branch of Young Womans Creek at 36.9 miles, and climbs to the top of the plateau again.

After another plunge off of the plateau, the trail walks through a semi-developed area alongside the East Fork of Sinnemahoning Creek starting at 63.4 miles.

[14] The STS then climbs to the top of the plateau yet again, and at 71.7 miles passes a junction with a short trail that leads west to the dilapidated Prouty Place State Park.

[16] The STS then makes a final extensive climb back to the top of the Allegheny Plateau, and reaches the end of the loop at 83.4 miles.