(Hidden Creek Campground, 30', 2003, 38-60-F #2) across Black Run in Hidden Creek Campground N. of Allenwood, Gregg Township, Union County, PA. US15 N. 2.2 miles from jct with PA44 in Allenwood to the campground & bridge on the E. side of the road. (N41 08.287 W76 54.680) Photos by Jack Schmidt 5-21-06.