Bull Run (Occoquan River tributary)

Bull Run
Tributary to Occoquan River
Location of Bull Run mouth
Bull Run (Occoquan River tributary) (the United States)
Location
CountryUnited States
StateVirginia
CountyFairfax
Prince William
Loudoun
Physical characteristics
SourceHungry Run divide
  locationCold Spring Gap
  coordinates38°56′21″N 077°39′11″W / 38.93917°N 77.65306°W / 38.93917; -77.65306
  elevation660 ft (200 m)
MouthOccoquan River
  location
about 1 mile northeast of Ravenwood, Virginia
  coordinates
38°43′21″N 077°22′51″W / 38.72250°N 77.38083°W / 38.72250; -77.38083
  elevation
120 ft (37 m)
Length31.80 mi (51.18 km)
Basin size193.89 square miles (502.2 km2)
Discharge 
  locationOccoquan River
  average229.13 cu ft/s (6.488 m3/s) at mouth with Occoquan River
Basin features
Progressionsoutheast
River systemPotomac River
Tributaries 
  leftFoley Branch, Cub Run, Little Rocky Run, Johnny Moore Creek, Popes Head Creek, Old Mill Branch
  rightBlack Branch, Chestnut Lick, Bull Run tributary, Little Bull Run, Youngs Branch, Holkums Branch, Flat Branch, Russia Branch, Buckhall Branch
BridgesLoudoun Drive, New Road, US 15, Peach Orchard Lane, Auburn Farm Road, Gum Spring Road, US 29, I-66, Old Centerville Road, VA 28, VA 612

Bull Run is a 31.8-mile-long (51.2 km) tributary of the Occoquan River that originates from a spring in the Bull Run Mountains in Loudoun County, Virginia, and flows south to the Occoquan River. Bull Run serves as the boundary between Loudoun County and Prince William County, and between Fairfax County and Prince William County.

Bull Run is primarily associated with two battles of the American Civil War: the First Battle of Bull Run (July 21, 1861) and the Second Battle of Bull Run (August 28–30, 1862), both Confederate victories. A narrow part of the creek called Yates Ford (near Manassas) is the scene of the Battle of Occoquan, and downstream about one mile is the current Yates Ford Road bridge between Fairfax and Prince William counties.