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Lucas Valley-Marinwood

680 Trail – Big Rock Ridge loop from Marinwood

Lucas Valley-Marinwood

680 Trail – Big Rock Ridge loop from Marinwood

Hard

5.0

(7141)

10,410

riders

680 Trail – Big Rock Ridge loop from Marinwood

03:01

26.5km

1,000m

Gravel riding

Hard gravel 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: May 8, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Loma Alta Open Space Preserve

Waypoints

Start point

Bus stop

Get Directions

4.31 km

680 Trail

Highlight (Segment) • Trail

The 680 Trail in Marin County has access points at the end of Manuel T. Freitas Parkway via the Mission Pass Bike Path and Fawn Drive. The terrain is fun, rolling trails.

Tip by

9.41 km

Loma Alta literally translates to "high hill" and is the highest point in the Loma Alta Open Space Preserve. A few different dirt roads and trails lead to the bald summit that looks over the surrounding hillsides.

Tip by

12.6 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

17.4 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.

Tip by

18.4 km

Big Rock Ridge

Highlight • Summit

Highest point on Big Rock Ridge Fire Road with panoramic views of the Bay, Marin county, and even across the East bay to Mt. Diablo and south to San Francisco. …

Tip by

26.5 km

End point

Bus stop

Way Types & Surfaces

Way Types

16.3 km

7.51 km

2.56 km

< 100 m

Surfaces

23.7 km

2.63 km

169 m

Elevation

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

Highest point (560 m)

Lowest point (20 m)

Weather

Wednesday 27 May

22°C

9°C

-- %

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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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680 Trail – Big Rock Ridge loop from Marinwood

680 Trail

Loma Alta Summit

Bay Area Ridge Trailhead

Lucas Valley Open Space Preserve

Big Rock Ridge

Nearby routes

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