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United States
Virginia
Fairfax County

Union Mill

The best walks and hikes around Union Mill

4.6

(135)

988

hikers

68

hikes

Hiking around Union Mill, primarily situated in the vicinity of Hemlock Overlook Regional Park in Virginia, features natural and unpaved paths through wooded areas. The terrain includes sections alongside the Bull Run Occoquan Trail and around Lake Burke, offering a mix of easy to moderate gradients. The region is characterized by its forests and riverine landscapes, providing diverse environments for outdoor activities.

Best hiking trails around Union Mill

  • The most popular hiking route is Burke Lake Loop Trail — Burke…

Last updated: August 7, 2026

5

hikers

#1.

Hemlock Overlook via Bull Run Occoquan Trail

7.93km

02:09

110m

110m

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Moderate

2

hikers

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

4.9

(38)

204

hikers

8.33km

02:07

20m

20m

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Tips from the Community

mtm05005
May 7, 2025, Battle of Blackburn's Ford

This is the site of the Battle of Blackburn's Ford (also known as the Skirmish at Blackburn's Ford) which took place in 1861. It was an important battle in the Civil War and was the precursor to the First Battle of Bull Run.

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Alex
August 21, 2024, Burke Lake Trail

Burke Lake Trail wraps around Burke Lake and is recognized as one of the top 10 fitness trails in the nation by the American Hiking Society. This 4.7-mile loop trail circles Burke Lake, offering a peaceful get-away from the city. The trail, mostly gravel-surfaced, is ideal for hiking, running, and biking.

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1

The park includes hills, dense forests and a stream that flows into the Potomac River. In this park the Bull Run-Occoquan Trail begins and continues along Hemlock Overlook Regional Park and ends at Bull Run Regional Park.

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Marika Abbà
August 24, 2022, Burke Lake

Lake Burke is the perfect place to take a walk and enjoy some tranquility from the hustle and bustle of everyday life.

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Frequently Asked Questions

What types of hiking trails can I expect around Union Mill?

The trails around Union Mill, primarily within Hemlock Overlook Regional Park in Virginia, feature natural and unpaved paths through wooded areas. You'll find routes alongside the Bull Run Occoquan Trail and around Lake Burke, offering a mix of easy to moderate gradients. The region is characterized by its forests and riverine landscapes.

Are there family-friendly hiking options near Union Mill?

Yes, there are many family-friendly options. For an easy and scenic walk, consider the Union Mills Trail & Bull Run Occoquan Trail loop in Hemlock Overlook Regional Park, which is just under 5 km and winds through forests and along the river. Many of the 37 easy routes in the area are suitable for families.

Can I bring my dog on the hiking trails around Union Mill?

While the guide data doesn't explicitly state dog-friendly policies for every trail, Hemlock Overlook Regional Park generally welcomes leashed dogs on its trails. It's always a good idea to check specific park regulations or individual trail rules before heading out with your furry friend.

Are there any circular hiking routes in the Union Mill area?

Yes, circular routes are a popular option. A notable one is the Burke Lake Loop Trail — Burke Lake Park, which is a moderate 8.3 km trail encircling Burke Lake. Another is the Hemlock Overlook Regional Park loop from Bull Run Marina - Trail Parking, a longer 16.8 km route through varied parkland.

What landmarks or natural features can I see along the trails?

The area offers several points of interest. You can explore the historic Stone Bridge — Manassas National Battlefield Park. Many trails also feature beautiful natural settings like Lake Mercer and the scenic Bull Run Occoquan Trail section, which runs alongside the river.

What is the overall difficulty level of hiking around Union Mill?

The hiking trails around Union Mill cater to various fitness levels. The majority of routes are classified as easy (37 trails) or moderate (20 trails), with only one trail considered difficult. This means you can find everything from gentle strolls to more challenging, longer routes with some elevation changes.

What do other hikers say about the trails in Union Mill?

The trails in Union Mill are highly regarded by the komoot community, boasting an average rating of 4.7 out of 5 stars from over 100 reviews. Hikers frequently praise the quiet woodlands, well-maintained paths, and the diverse scenery of riverfronts and lake views.

Are there any easy hikes with convenient parking near Union Mill?

Yes, many easy hikes are accessible. The Union Mills Trail Loop — Hemlock Overlook Regional Park is an easy 4.6 km route that typically has parking available at the park's facilities. It's always recommended to check specific trailhead information for parking details.

What kind of wildlife can I spot while hiking in the area?

The wooded areas and riverine landscapes around Union Mill provide habitats for diverse wildlife. While specific sightings vary, you might encounter various bird species, deer, and other small mammals common to Virginia's forests. Keep an eye out, especially during quieter times of day.

How long do hikes around Union Mill typically take?

Hikes around Union Mill vary in length and duration. Easy routes like the Union Mills Trail & Bull Run Occoquan Trail loop can take around 1 hour 20 minutes, while moderate trails such as the Fountainhead Regional Park loop from Lake Occoquan Shores might take over 2 hours. Longer routes, like the 16.8 km Hemlock Overlook Regional Park loop, can take over 4 hours.

Are there any challenging hikes for experienced hikers?

While the majority of trails are easy to moderate, there is at least one trail classified as difficult in the Union Mill area. These routes typically feature steeper sections, more rugged terrain, and longer distances, offering a good challenge for experienced hikers seeking a more strenuous adventure.

When is the best time of year to go hiking around Union Mill?

The best time to hike around Union Mill generally depends on your preference. Spring and fall offer pleasant temperatures and beautiful scenery, with blooming wildflowers or vibrant autumn foliage. Summer can be warm and humid, while winter provides a different, often quieter, experience, though some trails might be muddy or icy.

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