Just the walls remain of the 1815 Black Rock saw- and gristmill in Seneca Creek State Park. The structure was stabilized and representations of mill machinery were added in 1980.

Matthew

December 2, 2023

Running

The Black Rock Mill is just off the side of the Seneca Greenway and Seneca Ridge Trail within Seneca Creek State Park. The structure is a reminder of the work that was done in the area in the 1800s.

Natalie

January 19, 2024

Cycling

Built in 1815, little more than the walls remain of this saw and grist mill. Don't let that put you off though, peek inside you can find examples of mill machinery which were added in the 1980s to show how it used to work.

Routes here

Best routes to Black Rock Mill

riders

1. Seneca Creek loop — Maryland

55.4km

02:24

510m

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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Moderate

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2. Travilah Oak – Black Rock Mill loop from Adventist HealthCare Shady Grove Medical Center

38.6km

01:49

360m

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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Moderate

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3. Pierce Mill – Query Mill & Glen Road loop from Georgia Avenue–Petworth

104km

04:47

960m

Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.

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Hard

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Informations

Elevation 70 m

Weather

Today

Friday 6 February

1°C

-12°C

88 %

Additional weather tips

Max wind speed: 9.0 km/h

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Location: Darnestown, Montgomery County, Maryland, United States

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Dry Seneca Creek Stream Crossing

Seneca Creek State Park

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View of the Montgomery County Agricultural Reserve

Black Rock Mill

1. Seneca Creek loop — Maryland

2. Travilah Oak – Black Rock Mill loop from Adventist HealthCare Shady Grove Medical Center

3. Pierce Mill – Query Mill & Glen Road loop from Georgia Avenue–Petworth

Other Popular Places to Check Out

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