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Routes
Mountain biking trails
United States
Maryland
Montgomery County
Darnestown

Pennyfield Lock – Great Falls Overlook loop from Seneca

Routes
Mountain biking trails
United States
Maryland
Montgomery County
Darnestown

Pennyfield Lock – Great Falls Overlook loop from Seneca

Moderate

4.5

(9768)

9,769

riders

Pennyfield Lock – Great Falls Overlook loop from Seneca

02:39

32.9km

70m

Mountain biking

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

Last updated: April 7, 2026

Tips

Includes segments that go up or down a series of steps

You may need to carry your bike.

After 261 m for 7 m

After 32.7 km for 7 m

Waypoints

A

Start point

Parking

Get Directions

1

286 m

Riley’s lock

Highlight • Monument

Riley’s Lock is a fun, happening place. Every time I pass by it is bustling with activity. There are two row boat clubs along Seneca creek. There are kayak, jet …

Tip by

3.92 km

Dierrsen Wildlife Management Area

Nature Reserve

3

5.37 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

4

14.5 km

Great Falls Overlook

Highlight • Viewpoint

This is a spectacular waterfall on the Potomac River. Water gushes over a series of jagged rocks and flows through the Mather Gorge.

Tip by

5

15.4 km

Lock 15 marks the beginning of the "Six Locks" series, which raises the canal 50 feet past Great Falls. Built from red sandstone boulders transported from Seneca, these locks differ …

Tip by

16.5 km

Widewater

Lake

7

18.6 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

18.9 km

Chesapeake and Ohio Canal

Lake

9

22.8 km

Swains Lock

Highlight • Historical Site

These are hard to come by along the C&O canal and usually hidden. Always nice to know where to get water.

Tip by

B

32.9 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

32.4 km

238 m

238 m

< 100 m

< 100 m

< 100 m

Surfaces

19.6 km

12.0 km

734 m

247 m

238 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

Powered by Foreca

Today

Wednesday 6 May

22°C

14°C

44 %

Additional weather tips

Max wind speed: 10.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Easy

2

Seneca Creek Greenway to Clopper Lake Loop

01:02h

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