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Prince William Forest Park
Cabin Branch Pyrite Mine Trail
Fence-row leading to Geology site 4 on Cabin Branch Pyrite Mine Trail

National Park Service

This fence blocks access to foundations of the old pyrite mine complex.

Cabin Branch Pyrite Mine Trail (0.3 miles; 0.5 km)

This short trail descends down to an open expanse above the banks of the Quantico Creek, once the site of the Cabin Branch Pyrite Mine (1889-1920). During the mine’s operation, more than 200,000 long tons of pyrite was brought to the surface and processed into sulfuric acid.  This was used to make soap, fertilizer, and gunpowder. This trail can be reached by parking in lot D and traveling along the Pyrite Mine Road for about ten minutes until you reach the trail marker on your left.   

 
Geology trail, site four. A short description of Cabin Branch Pyrite Mine history.

National Park System

Geology Trail, marker 4

After traveling down the trail for about 8 minutes, you will come upon marker 4 of the Geology Trail. Here you can learn a brief history of the Cabin Branch Pyrite Mine.

 
The end of Cabin Branch Pyrite Mine Trail. Quantico Creek and  a trail sign giving direction.

National Park Service

Quantico Creek and the end of Cabin Branch Mine Trail

Follow the trail for a couple more minutes and you will come upon Quantico Creek and the North Valley Trail. From here you can follow North Valley Trail either north or south (by crossing the bridge) along the creek. Take the trail south to reach the site of the main Cabin Branch Pyrite Mine complex.

 
A bridge crossing over Quantico Creek leading to North Valley Trail and the old Cabin Branch Mine site.

National Park Service

Bridge crossing over Quantico Creek to Cabin Branch Mine Site

A bridge crossing over Quantico Creek will take you on the southern route of the North Valley trail where you can see the old Cabin Branch Pyrite Mine site and other foundations remaining from the 1889-1920 mine operation.
 
Office of Strategic Service (OSS) recruits learning Morse code during the Second World War  

Did You Know?
Prince William Forest Park was used by the Office of Strategic Services (forerunner to the CIA) as a training camp for spies during World War II. Today, you can rent a cabin where spies once learned their trade.

Last Updated: March 25, 2007 at 10:56 EST