South Branch Leach Creek begins on the slopes of West Mountain, on or near the border between Scranton and Ransom Township.

For the next several tenths of a mile, it continues flowing down the mountain until it reaches its confluence with Leach Creek near Terrace Lane and Pennsylvania Route 307.

The report estimated the rate of streambed seepage into mine workings to be 2.57 US gallons (9.7 L) per minute per 1 inch (2.5 cm) of rainfall.

The creek was added due to its presence in Patton's Philadelphia and Suburbs Street and Road Map, which was published in 1984.

[2] A mid-20th-century report found the length of the streambed of South Branch Leach Creek within coal measures to be 6,000 feet (1,800 m).