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historic_site

Black Rock Mill

11950 Clopper Road, Gaithersburg, MD 20878
Hours
Published schedule The surrounding park follows seasonal daily hours, but the Black Rock parking lot is currently closed until repairs are completed. A broader park schedule does not mean normal mill access is available.
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What people say

The roofless stone remains of a historic mill stand beside Seneca Creek in a separate western park area, offering a cultural-landscape stop distinct from Clopper Lake's day-use facilities. Do not use the Clopper Lake entrance for a mill-only visit. The Black Rock parking lot is currently closed for streambank rehabilitation, so normal vehicle arrival is not available and visitors should not improvise roadside parking. The park alert currently closes the Black Rock parking lot until streambank repairs are complete. Treat the site as unavailable for ordinary vehicle arrival and check the official alert before attempting any route.

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10 answers

Frequently requested details, researched and kept current by AuditMap.

Where exactly is Black Rock Mill?

Do not use the Clopper Lake entrance for a mill-only visit. The Black Rock parking lot is currently closed for streambank rehabilitation, so normal vehicle arrival is not available and visitors should not improvise roadside parking.

Sourced answer Researched Aug 10, 2026
Where should I park for Black Rock Mill?

Parking is distributed among the park office, lake, Boat Center, playground, picnic, and trail areas. The Black Rock parking lot is currently closed for streambank rehabilitation, so do not navigate there expecting normal vehicle access.

Sourced answer Researched Aug 10, 2026
When is Black Rock Mill open?

The surrounding park follows seasonal daily hours, but the Black Rock parking lot is currently closed until repairs are completed. A broader park schedule does not mean normal mill access is available.

Sourced answer Researched Aug 10, 2026
Are there restrooms near Black Rock Mill?

There is no dependable staffed restroom at the mill. Use developed park facilities before approaching any remote trail or historic-site route.

Sourced answer Researched Aug 10, 2026
Is Black Rock Mill free?

There is no separate mill admission, but applicable park service charges and rules still apply. Do not park illegally to avoid the closed lot.

Sourced answer Researched Aug 10, 2026
How accessible is Black Rock Mill?

The current parking closure removes the normal arrival option, and the historic ruin and creekside terrain are not a developed accessible visitor facility. Wait for official access guidance.

Sourced answer Researched Aug 10, 2026
Are dogs allowed at Black Rock Mill?

Do not take pets through a closed or improvised access. When official access resumes, keep dogs leashed and away from the ruin, creek, and restoration work.

Sourced answer Researched Aug 10, 2026
Is Black Rock Mill good for children?

The mill can be an interesting history stop when officially accessible, but it is not currently a dependable family arrival point because the parking lot is closed.

Sourced answer Researched Aug 10, 2026
What should I know before visiting Black Rock Mill?

The park alert currently closes the Black Rock parking lot until streambank repairs are complete. Treat the site as unavailable for ordinary vehicle arrival and check the official alert before attempting any route.

Sourced answer Researched Aug 10, 2026
How do you reach Black Rock Mill?

The park is primarily vehicle-oriented and spread across a large landscape. If using rideshare, select the exact day-use destination and arrange a return before entering a trail or remote historic-site area.

Sourced answer Researched Aug 10, 2026

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