Broad Run is a tributary stream of the Potomac River in Montgomery County, Maryland. The headwaters of the stream originates west of the town of Poolesville, and the creek flows southward for 8.9 miles (14.3 km) to the Potomac River. The Broad Run and its watershed are almost entirely within the Montgomery County Agricultural Reserve.
Tributaries of Broad Run 
- Wasche Road Tributary
- Big John Run
See also 
- ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed August 15, 2011
- ^ Montgomery County Department of Environmental Protection (MCDEP). Rockville, MD. "Broad Run Watershed Study." February 2001.
Coordinates: 39°06′49″N 77°29′10″W / 39.113717°N 77.4861°W