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Routes
Mountain biking trails
United States
Maryland
Montgomery County
Travilah

Pennyfield Lock – Dalecarlia Tunnel loop from Travilah

Routes
Mountain biking trails
United States
Maryland
Montgomery County
Travilah

Pennyfield Lock – Dalecarlia Tunnel loop from Travilah

Hard

2.7

(6)

32

riders

Pennyfield Lock – Dalecarlia Tunnel loop from Travilah

06:04

78.3km

420m

Mountain biking

Hard mountain bike ride. Very good fitness required. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: May 19, 2026

Tips

Includes a segment in which cycling is not permitted

After 28.7 km for 296 m

Waypoints

A

Start point

Parking

Get Directions

1

8.54 km

Bridge over Muddy Branch near Riley’s Lock

Highlight • Bridge

This is a very picturesque area, with the bridge, the creek, and the house up the hill beyond the field.

Tip by

2

9.39 km

Pennyfield Lock

Highlight • Monument

Lock 22, aka Pennyfield Lock, was built between 1829 and 1831, and the name came from the misspelling of the Pennifield family name. It has been restored and offers overnight stays to recreate the rustic feeling from that period.

Tip by

18.7 km

Viewpoint

Viewpoint

20.4 km

Widewater

Lake

28.8 km

Cedar Island Conservation Park

Nature Reserve

6

31.9 km

Little Falls Dam

Highlight • Monument

The Little Falls Dam is a low dam built in the Potomac in 1959. It now separates the Upper Potomac River and Lower Potomac River, forming the Little Falls Reservoir. …

Translated by Google •

Tip by

7

32.5 km

Lock 6, Chesapeake and Ohio Canal

Highlight • Monument

One of the locks (#6 of 75) on the Chesapeake and Ohio Canal. These should ensure the shipping traffic between Cumberland and Washington to transport coal.
The lock keeper's houses …

Translated by Google •

Tip by

8

33.9 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.

Translated by Google •

Tip by

9

39.8 km

Chesapeake & Ohio Canal Trail

Highlight (Segment) • Trail

This section of the trail offers a scenic stretch along the Chesapeake & Ohio Canal. Originating as a vital trade route facilitating the transport of coal, lumber, and agricultural goods, …

Tip by

51.1 km

Chesapeake and Ohio Canal

Lake

11

60.0 km

The Great Falls of the Potomac is a place with various rapids and small falls in the Potomac. The place marked here may only be entered on foot. Bicycles and dogs 😜 must stay outside.

Translated by Google •

Tip by

71.7 km

Blockhouse Point Conservation Park

Nature Reserve

B

78.3 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

65.8 km

8.09 km

2.84 km

1.53 km

101 m

< 100 m

Surfaces

31.8 km

26.0 km

11.0 km

8.29 km

655 m

557 m

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Elevation

Elevation

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

Highest point (110 m)

Lowest point (0 m)

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Weather

Powered by Foreca

Today

Friday 26 June

30°C

20°C

32 %

Additional weather tips

Max wind speed: 11.0 km/h

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Description

If you're looking for a serious endurance challenge on two wheels, the Pennyfield Lock – Dalecarlia Tunnel loop from Travilah is a difficult mountain biking route that delivers. Spanning 48.7 miles (78.3 km) with 1385 feet (422 metres) of elevation gain, this extensive loop will take you approximately 6 hours and 3 minutes to complete, making it ideal for experienced riders seeking a long day out.

What to expect on Pennyfield Lock – Dalecarlia Tunnel loop from Travilah

This route is a journey through varied landscapes, blending historic pathways with natural terrain. You'll spend significant time on the C&O Canal Towpath, an unpaved surface of packed clay and crushed stone that offers picturesque views of the Potomac River and historic canal structures. While mostly flat, this section can be rough and muddy after rain, so come prepared with a mountain or hybrid bike with wider tires. Later, the Capital Crescent Trail provides a smoother experience on its 10-foot wide asphalt path, leading you to the distinctive Dalecarlia Tunnel, a 340-foot-long brick structure with unique man-sized cutouts. Expect the difficulty to come from the sheer distance and sustained effort rather than consistently steep climbs, though trails around Travilah like the Muddy Branch Stream Trail can introduce more technical sections with roots and rocks.

Planning your visit

Given the varied terrain, a mountain bike or a sturdy hybrid with wider tires is essential, especially if there's been recent rainfall, as the C&O Canal Towpath can become quite muddy. The length of this loop demands good physical preparation and adequate hydration. While specific parking details aren't provided, starting from the Travilah area offers good access to this extensive network of mountain biking trails. Always check local conditions before heading out, particularly regarding trail resurfacing or potential mud on the C&O Canal.

Trail details

  • Distance: 48.7 miles (78.3 km)
  • Elevation gain: 1385 feet (422 metres)
  • Difficulty: difficult
  • Estimated time: 6 hours and 3 minutes

Nearby routes

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2

Seneca Creek Greenway to Clopper Lake Loop

01:02h

11.8km

80m

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