Shikellamy State Park is situated in two sections. Overlooking the confluence of the West and North Branches of the Susquehanna River, the 78-acre Shikellamy Overlook section is situated on the western shore of the Susquehanna River. The 54-acre Shikellamy Marina section in Northumberland County can be found at the confluence of the West and North Branches Susquehanna River, between the Borough of Northumberland and Sunbury on the southern tip of Packer’s Island. Visitors enjoy such seasonal activities as picnicking, boating, fishing, hiking, and biking.