Alder Run is a long third-order tributary to French Creek in Erie County.
Course Alder Run rises about 3 miles northwest of Beaver Dam, Pennsylvania, and then flows northwesterly to join French Creek about 3 miles southwest of Wattsburg, Pennsylvania.
Watershed Alder Run drains of area, receives about 46.3 in/year of precipitation, and is about 36% forested.
See also List of rivers of Pennsylvania
References