It is approximately 3.6 miles (5.8 km) long and flows through Jefferson Township and Archbald.

In Archbald, it turns west-southwest for several tenths of a mile and enters a ravine, where it receives an unnamed tributary from the left and passes through the Laurel Run Reservoir.

[2] Laurel Run joins the Lackawanna River 21.82 miles (35.12 km) upriver of its mouth.

[4] Some flow loss occurs in Laurel Run near its culvert under the Robert Casey Highway.

However, iron oxide is only deposited along a few hundred feet of the stream and mine reclamation efforts have been done in the area.

[4] Upstream of its confluence with the Lackawanna River, the peak annual discharge has a 10 percent chance of reaching 423 cubic feet per second.

[1] At its confluence with the Lackawanna River, the peak annual discharge has a 10 percent chance of reaching 48 cubic feet per second.

[1] The borough of Archbald once requested a permit to discharge stormwater into Laurel Run and a number of other streams.

[5] In the early 1900s, the stream was clear of culm and other forms of pollution as far downstream as the Olyphant Water Company's dam.

[4] From the Cawley Dam downstream to the culvert under the Robert Casey Highway, a 0.3-mile (0.5-kilometer) reach of Laurel Run has a high gradient and its course contains waterfalls, ravines, ledges, and slides.

[4] Upstream of the Robert Casey Highway, Laurel Run and its riparian area are mostly undisturbed, undeveloped, and on private property.

The Pennsylvania Department of Environmental Protection once created a Mine Drainage Pollution Abatement Project for the stream.

From the Cawley Dam downstream to the Robert Casey Highway, the stream has an "impressive" rhododendron growth in its riparian buffer.

For this reason, this stream reach is on the Special Places and Natural Areas list of the Lackawanna River Corridor Association.