 PA 93 enters Mifflin Township in Columbia County and immediately turns northwest to enter Briar Creek Township and cross over the Susquehanna River near the mouth of Nescopeck Creek.Upon reaching the north bank of the river, the road enters the borough of Berwick and passes over the North Shore Railroad before heading off the bridge and into the commercial downtown on South Market Street.The route immediately intersects US 11 and turns southwest to form a wrong-way concurrency with that route on the one-way pair of West 2nd Street northbound and West Front Street southbound, with each street carrying two lanes of traffic.