Query Mill & Glen Road – Black Rock Mill loop from North Bethesda

Query Mill & Glen Road – Black Rock Mill loop from North Bethesda

Hard

4.6

(8685)

17,271

riders

Query Mill & Glen Road – Black Rock Mill loop from North Bethesda

05:16

116km

1,110m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: September 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Seneca Creek State Park

Hoyles Mill Conservation Park

Cabin John Regional Park

Watts Branch Stream Valley Park

Little Seneca Greenway Stream Valley Park

Waypoints

Start point

Train Station

Get Directions

15.2 km

Query Mill & Glen Road

Highlight (Segment) • Cycleway

This is the type of beautiful, tree lined roads that cyclists dream about. The only drawback is the narrow/non-existent shoulder, traffic is usually pretty low but take care around hills and bends with low visibility.

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29.1 km

Seneca Schoolhouse

Highlight • Historical Site

Old Seneca Schoolhouse is a small 1800s school building tucked near the trails in Seneca Creek. It’s a cool little stop if you’re riding or hiking nearby—feels like stepping back …

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42.3 km

Poolesville Old Town Hall and Museum

Highlight • Historical Site

The former town hall is now a museum showcasing Poolesville's historic role during the Civil War. The museum displays artifacts found in the town and surrounding areas, encampment replicas, as well as drawings and pictures of individuals connected to Poolesville.

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42.5 km

K2 Cafe

Highlight • Cafe

The coffee shop is definitely biker friendly, they have a bottle fill fountain inside, coffee and energy for the return trip and have a foot pump to top up!

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86.8 km

South Germantown Recreational Park

Highlight • Rest Area

South Germantown Recreational Park is a very busy Montgomery Park. It is a large park that offers a variety of activities including hiking, biking, archery, miniature golf, swimming, soccer, picnicking, and adventure play along with many more.

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89.9 km

Black Rock Mill

Highlight • Historical Site

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.

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