Deer Run is a tributary of the Tohickon Creek in Bedminster Township, Bucks County, Pennsylvania in the United States.
Deer Run is contained wholly within Bedminster Township and is part of the Delaware River watershed. It's GNIS identification number is 1192341, the PA Department of Environmental Resources identification number is 03142. Its watershed is . It meets its confluence at the Tohickon Creek's 8.00 river mile.
Deer Run rises in Bedminster Township about east northeast of Elephant at an elevation of . It is, at first, south southeast oriented for about where it picks up an unnamed tributary from the south, and it turns and flows generally northeast for about where it receives an unnamed tributary on the left, then continues for another where it shares its confluence with Mink Run at the Tohickon Creek at an elevation of , resulting in an average slope of . Its mouth is only about upstream from Wolf Run.
Wolf Run lies within the Brunswick Formation in the Newark Basin laid down during the Jurassic and the Triassic. Rocks includes mudstone, siltstone, and reddish-brown, green, and brown shale. Mineralogy includes red and dark-gray argillite and hornfels.