• dogwood across creek

    Prince William Forest

    Park Virginia

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    Reminder to park visitors. Fireworks are prohibited at Prince William Forest Park.

  • Oak Ridge Campground Site A29 closure

    Oak Ridge Campground site A29 will be closed until safety concerns have been mitigated. Please do not use that site until it has been reopened.

  • Warm Wet Spring = More Ticks

    Please check yourself and your pets for ticks continually during and after your visit. Ticks are less prevelent if you stay on trail or in mowed areas. Wearing light colored clothing helps you spot them before the attach.

  • Firewood

    Outside firewood is prohibited in Prince William Forest Park, unless it is certified USDA 'bug free' firewood. Dead and downed wood may be collected from designated areas for use while in the park. Help us protect the forest from invasive species!

  • Visitor Center Remodel 2014

    Over the next several months there will be new changes coming to the Visitor Center. Presently we are remodeling the bookstore area to give it more of a country theme. Next the exibit area will get all new exhibits. Thank you for your patience and support

Cabin Branch Pyrite Mine Trail

Fence-row leading to Geology site 4 on Cabin Branch Pyrite Mine Trail

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

National Park Service

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.

Geology Trail, marker 4

National Park System

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.

Quantico Creek and the end of Cabin Branch Mine Trail

National Park Service

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.

Bridge crossing over Quantico Creek to Cabin Branch Mine Site

National Park Service

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.

Did You Know?

Office of Strategic Service (OSS) recruits learning Morse code during the Second World War

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.