From Wilderness.net:
Between Buckaloons Recreation Area and the town of Tionesta, a distance of approximately 56 miles, seven islands in the Allegheny River have been designated Wilderness. Alluvial in origin, the islands were formed from deposits of sand, mud, and clay that the river carried down from the Allegheny Mountains. Old river-bottom trees--willow, sycamore, and silver maple--characterize these little hunks of land. Crull's, at 96 acres, is the largest, followed by Thompson's and Baker (both 67 acres), Courson (62 acres), King (36 acres), R. Thompson's (30 acres), and No-Name (10 acres).