Pennsylvania's Department of Conservation and Natural Resources has a page on Tuscarora State Forest that includes a link to a public use map: http://www.dcnr.state.pa.us/forestry/stateforests/tuscarora/index.htm. You need to zoom in fairly well to get the detail (it's a PDF), but it does have some really granular topographical info, including an overlay of the forest's approximately 200 miles of trails. There are 23 miles of its namesake Tuscarora Trail that pass through the forest, as well as an interesting-looking ten-mile loop trail between Big Spring State Park and the Eby Cemetery. Hope this helps!