Bloody Run is a tributary of West Branch Fishing Creek in Sullivan County, Pennsylvania, in the United States.

Various glacial tills and bedrock consisting of sandstone and shale are found in the vicinity of the stream.

It turns south-southeast and then south for approximately two miles (three kilometers) and its valley continues to deepen.

[1] Bloody Run joins West Branch Fishing Creek 4.36 miles (7.02 km) upstream of its mouth.

[7] Bloody Run is designated by the Pennsylvania Department of Environmental Protection for use by aquatic life.

[3] A concrete slab bridge was constructed over Bloody Run 0.7 miles (1.1 km) west of Elk Grove in 1937.