The Upper Wicomico River encompasses the area upstream of a line beginning at a point, at or near Lat. 38° 21.028’ N., Long. 75° 37.282’ W., then running 145° (True) to a point, at or near Lat. 38° 20.958’ N., Long. 75° 37.220’ W., and running to the head of the river, including all tributaries. This area has a 6-knot speed limit all year.