Hemlock Run is a tributary of West Branch Fishing Creek in Sullivan County, Pennsylvania, in the United States. It is approximately 1.8 miles long and flows through Davidson Township. The stream has three unnamed tributaries. Its watershed has an area of 1.28 square miles. Wisconsinan Till Moraine, Wisconsinan Bouldery Till, Wisconsinan Fl…Hemlock Run is a tributary of West Branch Fishing Creek in Sullivan County, Pennsylvania, in the United States. It is approximately 1.8 miles long and flows through Davidson Township. The stream has three unnamed tributaries. Its watershed has an area of 1.28 square miles. Wisconsinan Till Moraine, Wisconsinan Bouldery Till, Wisconsinan Flow-Till, and Wisconsinan Till all occur near the stream.