East Branch of Oil Creek rises at the confluence of Stranahan and Patrick Runs in Clear Lake. It then flows south and southwest through the Erie Drift Plain to Centerville, Pennsylvania where it joins Oil Creek.
Tributaries
Tributaries of East Branch Oil Creek (Oil Creek tributary)
Twomile Creek rises about 0.75 miles southwest of Britton Run, Pennsylvania and then flows south to meet East Branch Oil Creek at Centerville, Pennsylvania.
Brannon Run rises on the McLaughlin Creek divide about 2 miles east of Centerville, Pennsylvania and then flows northwest to meet East Branch Oil Creek about 1.5 miles northeast of Centerville.
Britton Run rises in a pond on the Lilley Run divide about 1.5 miles west of Concord Corners, Pennsylvania. The run then flows generally south to meet East Branch Oil Creek about 1.5 miles west of Glynden, Pennsylvania.
Fivemile Creek rises about 2 miles east-northeast of Buell Corners on the Shirley Run divide. Fivemile Creek then flows north then west through Fish Flats to meet East Branch Oil Creek about 3 miles northeast of Centerville, Pennsylvania.
Patrick Run rises in a pond on the South Branch French Creek divide about 2 miles northeast of Spartansburg, Pennsylvania and then flows southwest to meet East Branch Oil Creek within Clear Lake at Spartansburg.
Stranahan Run rises about 1.5 miles northwest of Spartansburg, Pennsylvania in State Game Lands #144 on the Britton Run divide. The run then flows southeast to meet East Branch Oil Creek within Clear Lake at Spartansburg.
Watershed
East Branch Oil Creek drains 59.8 square miles (155 km2) of area, receives about 46.0 in/year of precipitation, has a topographic wetness index of 467.92, and has an average water temperature of 7.56 °C.[4] The watershed is 49% forested.[4]