Sinnemahoning State Park offers multiple access points to First Fork Sinnemahoning Creek and the 145-acre George B. Stevenson Reservoir, with a boat launch at the Lake Day Use Area and an ADA-accessible fishing pier.

The park features a 5-mile Lowlands Trail (crushed gravel rail trail) that parallels the creek and provides easy access to water entry points via numerous trail spurs, making it ideal for paddlers and anglers who can leave vehicles at the campground.

Amenities include a Wildlife Center, restrooms, parking areas at multiple day-use locations, and a campground with 35 electric sites.