Allegheny National Forest — The Kinzua Sky Walk, the Reservoir & Old-Growth Hearts Content
Two and a half hours northeast of Pittsburgh spreads Pennsylvania's only national forest — half a million acres of hardwood ridges, deep hollows, black-cherry timber, and the vast blue sheet of the Allegheny Reservoir. Three days here range across its greatest hits. Day one visits the astonishing Kinzua Bridge Sky Walk, where a former railroad viaduct toppled by a tornado has been reborn as a glass-floored skywalk over a 300-foot gorge. Day two circles the Allegheny Reservoir with cliff-top overlooks at Jakes Rocks and Rimrock and time on the water. Day three walks the ancient old-growth of Hearts Content and the riverside flats of Buckaloons before the drive home. A weekend of big engineering, big water, and big trees deep in the northern woods.