Bon Tempe Dam 🚵 – Shaver Grade Road loop from Mill Valley

Mountain biking trails

Bon Tempe Dam 🚵 – Shaver Grade Road loop from Mill Valley

Hard

4.9

(2847)

17,541

riders

Bon Tempe Dam 🚵 – Shaver Grade Road loop from Mill Valley

04:53

44.3km

1,470m

Mountain biking

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

Last updated: October 8, 2026

Tips

Cycling is not permitted along parts of this route

After 383 m for 80 m

After 2.68 km for 97 m

After 41.6 km for 97 m

After 43.9 km for 80 m

Waypoints

Start point

Bus stop

Get Directions

6.59 km

Railroad Grade Fire Road Overlook to San Francisco

Highlight • Viewpoint

On clear days views open up along the trail across the bay and including the San Francisco skyline

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7.30 km

Flowy downhill section above Laguna Creek

Highlight • Trail

After looping around West Point the Railroad Grade trail snakes through open and tree-lined sections with fun curves.

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7.59 km

Mount Tamalpais West Point

Peak

17.2 km

Rocky Ridge Road 🚵

Highlight (Segment) • Trail

Great hiking and mountain biking on this gravel fire road in Mt Tamalpais watershed. It climbs first gradually and increasingly steep from the west side of the Bon Tempe Dam to the top of the ridge line above Bon Tempe Lake. It affords great views in all directions from the top, particularly across Alpine and Bon Tempe Lakes below, Northern Marin, and all the way across to the San Francisco Bay in the East.
For a sweet 2 hour 🚵 mountain bike loop with 4 lakes involving this trail segment check out komoot.de/highlight/153264
To avoid this steep climb you can follow the paved Sky Oaks Road between Bon Tempe Lake and Lake Lagunitas, or hike the (no bikes allowed) Shady Side Trail along Bon Tempe Lake.
See 🚵 Tour komoot.de/tour/9817832 for highlighted segments and labeled photos

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20.2 km

Bon Tempe Dam 🚵

Highlight (Segment) • Structure

Great hiking and mountain bike destination in Mt Tamalpais watershed. The dam holds the waters of Bon Tempe Lake above the Alpine Lake just below.
For a sweet 2 hour mountain bike loop with 4 lakes involving this trail segment check out komoot.com/highlight/153264

See 🚵 Tour komoot.com/tour/9817832 for highlighted segments and labeled photos

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20.9 km

Alpine Lake - Bon Tempe Dam

Highlight • Lake

Great stop for a photo

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21.8 km

Shaver Grade Road

Highlight (Segment) • Trail

Great hiking and mountain biking on this gravel fire road in Mt Tamalpais watershed. It climbs gradually and mostly shaded from the Natalie Coffin Green Park parking lot in Ross below Phoenix Lake to the intersection with Sky Oaks Road near Bon Tempe Dam.

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25.2 km

Fish Gulch trail junction

Highlight • Trail

From easiest to hardest climbs out of phoenix lake from this junction:
-Shaver Grade, easy grade, longer, shaded and pretty
-Eldridge Grade, medium, good length and can connect you to mt tam east peak
-Fish Grade fire road, very steep, we hiked the bikes

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