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)

riders

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

03:20

29.9km

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: September 25, 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 223 m

Waypoints

Start point

Bus stop

Get Directions

9.19 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 …

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9.26 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.

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9.26 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.

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11.8 km

Big Rock Trail to ridge summit above Lucas Films Studio

Highlight • Summit

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 …

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14.0 km

Lucas Valley Open Space Preserve

Highlight • Natural

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.

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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.

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