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Marin Three Lakes Loop



14.3 mile 23.1 kilometer point to point
0% Singletrack


Ascent: 1,445' 440 m
Descent: -1,444' -440 m
High: 989' 301 m
Low: 24' 7 m


Avg Grade: 4% (2°)
Max Grade: 21% (12°)


No Dogs
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Trail shared by Bob Gardner

A scenic tour of Marin Municipal Water District watershed lands and lakes.

Bob Gardner

Electric Mountain Bikes Unknown

Features -none-


While tourists flock to Muir Woods, this ride on the opposite side of Mount Tamalpais will avoid the crowds while exploring a wooded landscape dotted with lakes. The climbs are gradual and mostly shaded and after a tour of the lakes you're rewarded with a fun descent to the trailhead.


This ride starts in the town of Ross near Ross Commons Park where parking is available on street and in a parking lot next to the Post Office. There is limited parking at Natalie Coffin Greene Park which may come in handy, as the trailhead fills quickly- especially on weekends.

It's about a mile up paved Lagunitas Road from Ross to reach the trailhead at Phoenix Lake which is the first of the three lakes in the tour. Keep right along the lake shore to the 4-way intersection and stay on the Shaver Grade trail to the right. Shaver Grade follows a shaded creek canyon and gradually climbs a ridge where you reach the Five Corners junction. A sharp left will keep you on Shaver Grade, and is followed with a short climb to Sky Oaks Road.

A right on Sky Oaks Road and quick left will bring you to Bon Tempe Road: Sky Oaks Road - Bon Tempe Lake connector and across Bon Tempe Lake dam with nice views of Mount Tam and if the water level is high enough, you may see the upper part of Alpine Lake below the dam.

Double back across the dam and turn left onto Bullfrog Road which loops around to the north and rejoins Sky Oaks Road. Turn right on paved Sky Oaks Road and follow it along the upper part of Bon Tempe Lake to the parking area near Lake Lagunitas. Continue up the access road to the dam then across to the Lake Lagunitas Loop Trail. Follow the trail in a counter-clockwise direction along the shoreline.

At the upper end of the lake, turn right on the Lakeview Road trail. For an easier ride option, loop around the lake back to Sky Oaks Road and returning via Shaver Grade. Lakeview Road is a steady climb becoming steeper as it joins Eldridge Grade. Eldridge Grade is a downhill run, steep in places, all the way to the junction with Shaver Grade where a right turn brings you back to Phoenix Lake and the trailhead.

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We need help with the following missing trail information:

Family Friendly, ADA Accessible, Need to Know, Features, Electic Mountain Bikes Allowed, History & Background


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Jun 5, 2020
Leonard Wheeler
Jul 15, 2019
Barry Turner
Jun 8, 2019
Jim Kidd
Jun 7, 2019
Patrick Diaz
Jun 3, 2019
Gabe B
May 27, 2019
Josh Ryland
Apr 26, 2019
Sonny Gamble
Mar 21, 2019
Marlena Sobel

Trail Ratings

  3.8 from 11 votes


in Marin County


  3.8 from 11 votes
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489 Views Last Month
12,195 Since Jan 7, 2016



Rolling across Bon Tempe Dam.
Jan 15, 2016 near Fairfax, CA
Bullfrog Trail.
May 13, 2016 near Fairfax, CA
Lakeview Road BEFORE the last climb.
Jan 15, 2016 near Kentfield, CA
Flat repair where Bullfrog Road turns into a trail.
Jan 15, 2016 near Fairfax, CA
Making progress on the Shaver Grade climb.
Jan 15, 2016 near Fairfax, CA
Pausing on Lake Lagunitas Dam.
Jan 15, 2016 near Kentfield, CA


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