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Mountain biking trails

Black Rock Mill – Seneca Quarry Stone Mill Ruins loop from Seneca

Routes

Mountain biking trails

Black Rock Mill – Seneca Quarry Stone Mill Ruins loop from Seneca

Moderate

2.9

(19)

riders

Black Rock Mill – Seneca Quarry Stone Mill Ruins loop from Seneca

03:00

35.3km

300m

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: June 14, 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 35.1 km for 7 m

Waypoints

Start point

Parking

Get Directions

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

873 m

Old Seneca Quarry Stone Mill

Highlight • Historical Site

Seneca Quarry provided the stone for hundreds of buildings in and around Washington DC. The stone was lilac grey when removed, but turned a red color over time.

Tip by

3.76 km

Seneca Bluffs Trail

Highlight (Segment) • Trail

This trail is ideal for hiking, running, and mountain biking due to its predominantly smooth terrain that doesn't feature many rocks or roots to navigate around. Throughout the majority of …

Tip by

6.33 km

Dry Seneca Creek Stream Crossing

Highlight • River

Crossing Dry Seneca Creek on stepping stones.

Tip by

14.2 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.

Tip by

17.3 km

Schaeffer Farm Trail System

Highlight • MTB Park

Schaeffer Farm Trail System is located in the heart of Seneca Creek State Park. No matter what you are up to, you will find it here: a small after work …

Tip by

29.8 km

Seneca Bluffs Trail

Highlight (Segment) • Trail

This trail is ideal for hiking, running, and mountain biking due to its predominantly smooth terrain that doesn't feature many rocks or roots to navigate around. Throughout the majority of …

Tip by

34.7 km

Seneca Quarry Stone Mill Ruins

Highlight • Historical Site

Built in 1837 by the Seneca Sandstone Company, this mill was created to process the distinctive red sandstone quarried nearby. Today, the ruins, easily spotted by their red sandstone walls, …

Tip by

35.3 km

End point

Parking

Way Types & Surfaces

Way Types

30.7 km

2.43 km

866 m

622 m

608 m

101 m

< 100 m

Surfaces

30.2 km

2.28 km

1.36 km

964 m

251 m

247 m

Elevation

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

Highest point (130 m)

Lowest point (60 m)

Weather

Today

Wednesday 24 June

28°C

14°C

0 %

Additional weather tips

Max wind speed: 8.0 km/h

to get more detailed weather forecasts along your route

Comments

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

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Black Rock Mill – Seneca Quarry Stone Mill Ruins loop from Seneca

Riley’s lock

Old Seneca Quarry Stone Mill

Seneca Bluffs Trail

Dry Seneca Creek Stream Crossing

Black Rock Mill

Schaeffer Farm Trail System

Seneca Bluffs Trail

Seneca Quarry Stone Mill Ruins

Nearby routes

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