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Routes
Bike touring routes & trails
United States
California
Marin County
Lucas Valley-Marinwood

Bay Area Ridge Trailhead – Big Rock Ridge loop from Sleepy Hollow

Routes
Bike touring routes & trails
United States
California
Marin County
Lucas Valley-Marinwood

Bay Area Ridge Trailhead – Big Rock Ridge loop from Sleepy Hollow

Hard

3.4

(8)

61

riders

Bay Area Ridge Trailhead – Big Rock Ridge loop from Sleepy Hollow

03:20

30.0km

1,000m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: June 22, 2026

Tips

Includes very steep uphill segments

You may need to push your bike.

After 3.77 km for 161 m

After 5.67 km for 226 m

Waypoints

A

Start point

Bus stop

Get Directions

1

9.21 km

Bay Area Ridge Trailhead

Highlight • Trail

There is plenty of street parking at this trailhead, with the amazing Big Rock nearby to make it easy to spot. The Bay Area Ridge Trail runs along the ridgelines …

Tip by

2

9.27 km

The Big Rock - Skywalker Ranch

Highlight • Natural Monument

As the name implies, a big bolder marks the crest of Lucas Valley Road above Skywalker Ranch, the elusive retreat and production studios of George Lucas and his various film projects.

Tip by

3

9.27 km

Big Rock -- Lucas Valley Rd Summit

Highlight • Natural Monument

Be careful on the descent, the pavement can get slippery. This is a great trail access spot for MTB and hiking.

Tip by

4

11.8 km

Big Rock Trail cuts through Lucas Valley Open Space to reach the 2nd highest point in Marin County. From later winter through early summer the hills are verdant green and …

Tip by

5

14.1 km

The wide firm gravel fire roads are bikeable and worth it for the fantastic views, though getting up on the ridge is a bit steep. No access via Skywalker Ranch road.

Tip by

6

14.7 km

Big Rock Ridge

Highlight (Segment) • Summit

With 360 degree panoramas at multiple points, perfectly groomed trails, and undulations to keep things interesting (and challenging) this is a great ridge to enjoy for multiple abilities.

Tip by

7

25.2 km

Terra Linda-to-Ignacio Bike Path

Highlight (Segment) • Cycleway

Smooth high-speed dedicated bike trail through a green corridor parallel to Hwy 101

Tip by

B

30.0 km

End point

Bus stop

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Way Types & Surfaces

Way Types

12.7 km

12.2 km

4.37 km

583 m

< 100 m

Surfaces

25.0 km

4.91 km

< 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.

Highest point (560 m)

Lowest point (10 m)

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Weather

Powered by Foreca

Today

Saturday 27 June

23°C

13°C

14 %

Additional weather tips

Max wind speed: 23.0 km/h

to get more detailed weather forecasts along your route

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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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