en Bull Run

Bull Run or Bullrun may refer to:

Military

First Battle of Bull Run (First Manassas), 1861, the first major battle of the American Civil War
Second Battle of Bull Run (Second Manassas), 1862, a later battle also at Bull Run
Operation Bull Run, a military operation of the Iraq War and part of Operation Marne Torch
Bullrun (decryption program), a secret anti-encryption program run by the US National Security Agency (NSA)
USNS Bull Run (T-AO-156), an oil tanker

Bull Run (Occoquan River tributary), a stream in Fairfax, Loudoun, and Prince William counties, site of the Civil War battles
- Bull Run, Fairfax County, Virginia, a census-designated place west of Centreville, east of the stream; See U.S. Route 29 in Virginia
- Bull Run, Prince William County, Virginia, a census-designated place northwest of Manassas, west of the stream
- Bull Run Mountain Estates, Virginia, a census-designated place in Prince William County, southwest of the stream
- Bull Run Regional Park, on the stream in Fairfax County
Bull Run Mountains, a mountain range in Fauquier, Loudoun, and Prince William counties

Bull Run Mountains (Nevada), a mountain range in Elko County
Bull Run (Deep River tributary), a stream in Guilford County, North Carolina
Bull Run River (Oregon)
- Bull Run Lake, a reservoir, an impoundment of the river
- Bull Run Hydroelectric Project, a former dam project on the river
- Bull Run, Oregon, an unincorporated community named for the river
- Bull Run National Forest, a former national forest
Bull Run Creek, a stream in South Dakota
Bull Run Fossil Plant also known as Bull Run Steam Plant, a coal-fired electric generating station owned by the Tennessee Valley Authority

Bull Run (novel), a young adult novel by Paul Fleischman about the First Battle of Bull Run
The Battles of Bull Run, a 1973 board wargame that simulates both battles of Bull Run
Bullrun Rally, an automobile rally in North America
Bull running, a defunct event once common in England, in which townsfolk chased down a bull then slaughtered it
- Stamford bull run, the last surviving such event, ending in 1839
- Tutbury bull run
Running of the bulls, events in Spain, Portugal, France, and Mexico, in which people run in front of a number of bulls, often used in bullfighting after the run