| Bull Run Mountains | |
|---|---|
 | |
| Highest point | |
| Peak | Signal Mountain |
| Elevation | 1,329 ft (405 m) |
| Dimensions | |
| Length | 15 mi (24 km) NE-SW |
| Width | 3 mi (4.8 km) E-W |
| Geography | |
| Country | United States |
| State | Virginia |
| Range coordinates | 38°53.6′N 77°40.8′W / 38.8933°N 77.6800°W |
| Parent range | Blue Ridge Mountains |
| Geology | |
| Orogeny | Alleghenian |
| Type of rock | Catoctin Greenstone |
The Bull Run Mountains are a mountain range of the Blue Ridge Mountains in northern Virginia in the United States. Located approximately 20 miles (32 km) east of the main chain, across the Loudoun Valley. The Bull Run Mountains, together with Catoctin Mountain in Virginia and Maryland, make up the easternmost front of the Blue Ridge.
The mountain range is the home of the Virginia Outdoors Foundation's Preserve at Bull Run Mountains,[1] which is a state-designated Natural Area Preserve dedicated to the scientific and educational potential of the region. The Preserve at Bull Run Mountains has over seven miles of trails that are open to the public on Fridays, Saturdays, and Sundays - year round.
The mountain range also holds several communities of residents, which includes the Bull Run Mountain Estates.
Interstate 66, the John Marshall Highway (Virginia Route 55) and the Manassas Gap Railroad pass through the range at Thoroughfare Gap.