Harrison Hills Park occupies the extreme northeast portion of Allegheny County, bordering the Allegheny River and offering a magnificent overlook in which the viewer can see three other counties --- Westmoreland, Butler and Armstrong.
Th 500-acre park features streams, waterfalls, two ponds, a children's play area and three soccer fields.
Harrison Hill's beautiful picnic groves and shelters are named after seeing birds, trees and plants: Wake Robin, Laurel, Buckeye and Overlook.
Just north of the park's entrance is the eastern trailhead of the 35.7-mile hiking trail named in honor of environmentalist Rachel Carson (1907–1964).
Daily, dawn to dusk.
Free, on-site parking is available.