It then receives an unnamed tributary from the left and turns southeast for several tenths of a mile, continuing down the slope.

For some distance, it flows along the border between Carbondale Township and Mayfield before crossing a highway and reaching its confluence with the Lackawanna River.

[1] Lees Creek joins the Lackawanna River 26.78 miles (43.10 km) upriver of its mouth.

[4] It experiences some flow loss upstream of US Business Route 6, but is still a perennial stream as far as the culvert that carries it under that highway.

[4] In its lower reaches, the channel of Lees Creek passes through coal waste, cinders, and railroad ballast.

[7] Historically, the O and W Reservoir on Lees Creek was used as a water supply for the Mayfield Rail Yard of the New York, Ontario and Western Railway.

[4] In the early 2000s, the Lackawanna River Watershed Conservation Plan recommended that the lower 2,000 feet (610 m) of Lees Creek receive channel lining and restoration.