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Routes
Hiking trails & Routes
United States
Virginia
Fairfax County
South Run

Lake Mercer loop

Easy

2.9

(13)

94

hikers

Lake Mercer loop

01:43

6.63km

40m

Hiking

Hike the easy Lake Mercer loop, a 4.1-mile trail offering continuous lake views in Springfield, Virginia.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

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1

3.57 km

Lake Mercer

Highlight • Lake

A truly lovely place where people can spend time with friends or their family.

Tip by

B

6.63 km

End point

Parking

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Way Types & Surfaces

Way Types

6.44 km

153 m

Surfaces

4.65 km

1.11 km

537 m

280 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

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Today

Monday 11 May

18°C

9°C

57 %

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Max wind speed: 8.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the terrain like on the Lake Mercer loop?

The trail features a diverse terrain, primarily consisting of paved sections, but also includes gravel paths. While mostly wooded, you'll encounter gentle inclines and declines, with a few short, steeper climbs. Some areas may have rocky gravel surfaces, and the path is generally wide.

How long does it typically take to complete the loop?

Most hikers can complete the Lake Mercer loop in about 2 to 2.5 hours at a leisurely pace. The total distance is approximately 6.6 kilometers (4.1 miles).

Is the Lake Mercer loop suitable for beginners or families with children?

Yes, the Lake Mercer loop is generally considered easy and is suitable for beginners and families. It's a multi-use trail popular for leisurely strolls, jogging, and biking, making it accessible for various activity levels.

Where can I park and access the trailhead for the Lake Mercer loop?

You can easily access the Lake Mercer loop from South Run District Park or directly within Lake Mercer Park. South Run District Park and the adjacent South Run RECenter offer convenient parking and amenities like restrooms, making it a popular starting point.

Is the trail dog-friendly?

Yes, the Lake Mercer loop is dog-friendly. Please ensure your dog remains on a leash and that you clean up after them to maintain the trail's cleanliness for all users.

What can I see along the route?

The trail offers continuous views of Lake Mercer, especially from the scenic walkway over the Lake Mercer Dam, which has benches for resting. You'll also enjoy largely shaded paths through deciduous trees and opportunities for wildlife observation, including various birds, deer, and even beavers.

What is the best time of year to hike the Lake Mercer loop?

The Lake Mercer loop is enjoyable year-round. However, spring and fall offer particularly pleasant conditions with comfortable temperatures and beautiful foliage. The trail is largely shaded, making it a good option even on warmer days.

Are there any permits or entrance fees required to access Lake Mercer Park or the trail?

No, there are no permits or entrance fees required to access Lake Mercer Park or to hike the Lake Mercer loop trail. It is free and open to the public.

Does the trail intersect other well-known paths?

Yes, the route also passes through sections of the Wagon Trail Lane and the Grass Trail. It also connects to the larger South Run Stream Valley Trail and can link to the Burke Lake Trail at its northern end, providing options for longer excursions.

Are there any specific sections of the trail that are more challenging?

While generally easy, some sections on the south side of Lake Mercer have been noted to have steeper inclines. These are short but can add a bit more challenge compared to the mostly gentle, rolling hills.

What kind of wildlife can I expect to see?

The Lake Mercer loop is excellent for wildlife observation. You might spot various birds, squirrels, deer, foxes, beavers, and turtles. Birdwatchers can look out for herons, eagles, and hawks.

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Trail Reviews

Israel Morales
September 4, 2022, Lake Loop from Newberry Station

This was a great easy hike, doing rehab. I wish it had less concrete path and more trail.

Lake Mercer Park Loop offers an enjoyable hiking and bike experience with its combination of paved and gravel paths. You’ll find occasional side trails that lead to the lake by dirt paths, all boasting stunning views. This easy trail features several potential exit points near residential areas. As of 2025, T-Mobile users may experience low but existing cell phone coverage, here. Among the points of interest are a couple of bridges crossing creeks, the lake itself, a large dam, and facilities conveniently located near the parking area. This trail attracts hikers, cyclists, and joggers alike. If you decide to bring your dog, be sure to keep it leashed at all times, as per park regulations, as there are other dogs. This loop is perfect for testing out new gear and for core strength training in preparation for larger trips.

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