Dalecarlia Tunnel – Potomac River loop from Friendship Heights

Running trails & routes

United States

District Of Columbia

Dalecarlia Tunnel – Potomac River loop from Friendship Heights

Hard

4.6

(4328)

6,407

runners

Dalecarlia Tunnel – Potomac River loop from Friendship Heights

02:34

24.3km

130m

Running

Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 12, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Chesapeake and Ohio Canal National Historical Park

Little Falls Stream Valley Park

Waypoints

Start point

Train Station

Get Directions

6.34 km

Dalecarlia Tunnel

Highlight • Structure

The Dalecarlia Tunnel runs the Capital Crescent Trail under the Washington Aqueduct and MacArthur Boulevard. It was built in 1910 as a railway tunnel and is now over 100 years old.

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10.5 km

Fishing Shore Beach

Highlight • Beach

Nestled beside the Capital Crescent Trail, this cozy fishing beach along the Potomac River invites cyclists to stop and recharge. A perfect spot to take a breather from your ride.

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13.1 km

Potomac River

Highlight • River

The Potomac River, stretching 405 miles from the Potomac Highlands in West Virginia to Maryland's Chesapeake Bay, ranks as the fourth-largest river on the East Coast. Swimming is prohibited in …

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19.8 km

The Dalecarlia Tunnel, completed in 1910, is part of the Capital Crescent Trail and was originally built as a railroad tunnel. This is a very popular destination for walkers, runners, and cyclists, so be prepared to share the path.

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