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Alto Bowl Open Space Preserve loop from Mill Valley

Routes

Hiking trails & Routes

Alto Bowl Open Space Preserve loop from Mill Valley

Moderate

hikers

Alto Bowl Open Space Preserve loop from Mill Valley

02:05

7.27km

180m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: October 9, 2025

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Your route passes through protected areas

Please check local regulations for:

Horse Hill Open Space Preserve

Alto Bowl Open Space Preserve

Camino Alto Open Space Preserve

Waypoints

Start point

Bus stop

Get Directions

3.83 km

Camino Alto OSP - Fire Road Trailhead

Highlight • Trail

Pretty view of the SF skyline from the entrance to a vast trail and fireroad network, for long hikes into the Marin Hills and Mt Tam, some shared with mountain bikes.

Tip by

4.47 km

Alto Bowl Open Space Preserve

Nature Reserve

5.98 km

Horse Hill Open Space Preserve

Nature Reserve

7.27 km

End point

Bus stop

Way Types & Surfaces

Way Types

2.66 km

2.59 km

1.74 km

288 m

Surfaces

4.05 km

2.28 km

671 m

275 m

Elevation

Highest point (100 m)

Lowest point (10 m)

Weather

Today

Saturday 29 November

11°C

8°C

0 %

If you start your activity now...

Max wind speed: 6.0 km/h

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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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Alto Bowl Open Space Preserve loop from Mill Valley

Camino Alto OSP - Fire Road Trailhead

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