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Running trails & routes
United States
Virginia
Prince William County

Fern Hollow Loop

Moderate

3.0

(3)

99

runners

Fern Hollow Loop

00:44

5.73km

130m

Running

Jog the moderate 3.6-mile Fern Hollow Loop in Bull Run Mountains Natural Area Preserve, featuring wooded paths and historical ruins.

Last updated: February 26, 2026

Waypoints

A

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Parking

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1

77 m

Wooded Path in Bull Run Mountains Natural Area Preserve

Highlight • Trail

The Bull Run Mountains State Natural Area encompasses nearly 2,500 acres of forests, cliffs, ravines, valleys, and summits. There are miles of trails of varying difficulties, but most of the …

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5.73 km

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Parking

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Way Types & Surfaces

Way Types

5.65 km

< 100 m

< 100 m

Surfaces

5.64 km

< 100 m

< 100 m

< 100 m

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Elevation

Elevation

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Weather

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Today

Thursday 7 May

18°C

10°C

34 %

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Max wind speed: 16.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it typically take to jog the Fern Hollow Loop?

The Fern Hollow Loop is approximately 5.7 kilometers (3.5 miles) long. For jogging, it typically takes around 45 minutes to complete, depending on your pace and how often you stop to enjoy the scenery.

What is the terrain like on the Fern Hollow Loop?

The terrain consists primarily of singletrack paths that can be rough and uneven, with exposed roots. You'll jog through wooded slopes, and there's a noticeable, mostly uphill ascent that provides a good cardiovascular workout. While trails are maintained, occasional treefalls can occur.

Are there any historical landmarks or viewpoints along the route?

Yes, the route is rich in both natural beauty and historical significance. You can discover various historical features, including upper mill and meadowlands ruins, an ice house structure, the Corum House, and the LJ cemetery. Portions of the western side of the trail also offer views of Chapman Mill, Thoroughfare Gap, and a natural quarry line that served as an entrenchment during the American Civil War.

Is the Fern Hollow Loop suitable for beginners?

The Fern Hollow Loop is generally rated as 'moderate' due to its uneven terrain and mostly uphill sections. While it provides a good challenge, beginners with a reasonable level of fitness should be able to complete it. It's a great trail to build endurance.

What wildlife might I encounter while jogging this trail?

The thick woods and diverse habitats of the Bull Run Mountains Natural Area Preserve offer opportunities to spot various wildlife. Common sightings include squirrels, deer, turtles, and frogs. Keep an eye out for rattlesnakes, and there's also a possibility of encountering black bears.

What is the best time of year to jog the Fern Hollow Loop?

The trail offers different experiences throughout the year. Spring brings wildflowers, while autumn showcases vibrant fall colors, making these seasons particularly scenic. The preserve is open year-round from Friday to Sunday, so you can enjoy it in any season, just be mindful of weather conditions.

Is the Fern Hollow Loop dog-friendly?

The provided information does not specify whether dogs are allowed on the Fern Hollow Loop or within the Bull Run Mountains Natural Area Preserve. It's always best to check the official website or contact the preserve directly for their current pet policy before planning your visit.

Where can I park to access the Fern Hollow Loop?

The specific parking location for the Fern Hollow Loop is not detailed in the provided information. However, as the trail is located within the Bull Run Mountains Natural Area Preserve, you should look for designated parking areas at the preserve's main entrance or trailheads. Always check the preserve's official website for up-to-date access and parking information.

Do I need a permit or pay an entrance fee for the Bull Run Mountains Natural Area Preserve?

The provided information does not specify if permits or entrance fees are required for the Bull Run Mountains Natural Area Preserve. It's recommended to check the official website of the preserve or contact them directly to confirm any entry requirements or fees before your visit.

Does the Fern Hollow Loop intersect with other trails?

Yes, the route you'll be jogging on the Fern Hollow Loop also passes through sections of other official trails within the preserve. You'll find yourself on parts of Dawson's Trail and the Beech Ridge Loop during your journey.

What are the operating hours for the Bull Run Mountains Natural Area Preserve?

The Bull Run Mountains Natural Area Preserve, where the Fern Hollow Loop is located, is open to visitors from Friday through Sunday, year-round. It's advisable to check their official website for specific opening and closing times, as these can sometimes vary by season.

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