Peterman Run begins on a plateau in Davidson Township, Sullivan County.

After approximately a thousand feet (three hundred meters), it reaches its confluence with West Branch Fishing Creek.

[2] A total of 1.63 miles (2.62 km) of Peterman Run is considered to be impaired due to atmospheric deposition and metals.

The impaired waters of the stream comprise approximately 4.01 percent of the total impaired waters in Sullivan County within the watersheds of West Branch Fishing Creek and East Branch Fishing Creek.

Alluvial terrace also occurs near the stream's lower reaches, in the valley of West Branch Fishing Creek.

[5] Peterman Run was entered into the Geographic Names Information System on August 2, 1979.