This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "Paper Mill Run" – news · newspapers · books · scholar · JSTOR (December 2023) This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (December 2023) (Learn how and when to remove this message) (Learn how and when to remove this message)

Paper Mill Run, also known as Monoshone Creek, is a small tributary of Wissahickon Creek that is located in Philadelphia, Pennsylvania, USA. Its watershed includes parts of the Mount Airy and Germantown neighborhoods of Philadelphia.

For most of its length, the present-day stream flows under Lincoln Drive. The stream first sees daylight near Johnson Street.

Monoshone is a word of obscure origin and unknown meaning. In present-day usage, the name Monoshone applies simultaneously to a creek, the watershed that drains into this creek, the valley that this creek has shaped, and some 100 acres of recreational parkland that surround it. The Monoshone lies completely within the City of Philadelphia and is part of a trout-stocked fishery.

William Rittenhouse, grandfather of the astronomer David Rittenhouse, built the first paper mill in America along Paper Mill Run in the late seventeenth century. This location was then known as Rittenhousetown. During the eighteenth century, the stream was dammed at several points to power more mills.

In recent years, the creek has been polluted from an unknown source that may have to do with a sewer line routed next to the buried stream along Lincoln Drive. A controversial wetlands restoration project in Saylor's Grove was built in 2006, in part an attempt to reduce the pollution of the stream by providing a natural buffer for some of the water flowing into it.

• List of rivers of Pennsylvania

• Finkel, Kenneth, ed. Philadelphia Almanac and Citizen’s Manual. Philadelphia, PA: Library Company, 1995.

• Creek to sewer history
• aerial photo
• Saylor's Grove site at Fairmount Waterworks
• Historic RittenhouseTown

40°01′51″N 75°11′18″W / 40.030773°N 75.188467°W / 40.030773; -75.188467