4.7
(182)
1,509
riders
55
rides
White Hill Open Space Preserve mountain bike trails traverse a diverse landscape featuring extensive networks of both wide fire roads and challenging singletrack. The terrain includes varied woodlands with coast live oak, California bay, and redwood trees, transitioning to open grasslands and chaparral-covered hills. Higher elevations reveal stands of manzanita and unique serpentine rock formations. This preserve acts as a gateway to a vast system of trails west of Fairfax, connecting to adjacent natural spaces like Loma Alta Preserve.
Last updated: May 13, 2026
5.0
(1)
15
riders
13.3km
01:17
340m
340m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.0
(1)
9
riders
7.70km
00:53
240m
240m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.

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4.3
(3)
16
riders
25.2km
02:37
720m
720m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
16
riders
29.8km
02:38
640m
640m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
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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
1
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Great spot post hiking or biking, good beer, good vibes, great food, and vegan options!
0
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On Shaver Grade Road, you get to ride along the incredibly blue waters of Phoenix Lake.
1
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This is an easy gravel road along the shore of Lake Lagunitas. If you run out of water just follow the trail around the lake until you hit the parking lot where you can refill your water bottle.
1
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Gestalt Haus is a great get together for cyclists. The restaurant has an indoor bicycle garage, european craft beers and great sausages. What else can you wish for after an awesome mountain bike loop?
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This is the trailhead to several excellent mountain biking trails at Camp Tamarancho. There is $6 day pass required to ride.
1
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Strategic intersection of three trails/forest roads
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0
White Hill Open Space Preserve offers a wide selection of mountain bike trails, with over 60 routes recorded on komoot. These range from wide fire roads to challenging singletrack, catering to various skill levels.
The preserve is enjoyable year-round, but spring is particularly vibrant with wildflowers. Conditions can vary seasonally; checking local weather and trail reports before heading out is always a good idea. The terrain includes rougher, rockier sections, which can be affected by rain.
Yes, while many trails are intermediate to difficult, there are options suitable for less experienced riders. The preserve features 5 easy routes and 36 moderate routes. For a moderate option, consider the Porcupine Trail loop from Woodacre, which offers a shorter path through varied woodlands.
The preserve is renowned for its outstanding panoramic views, especially from the White Hill summit (1,404 to 1,430 feet). From here, you can see Mount Tamalpais, San Pedro Mountain, Mount Diablo, Loma Alta, and the expansive San Francisco Bay.
Absolutely. White Hill Open Space Preserve features 23 difficult routes, with challenging climbs and rougher, rockier sections. For a demanding ride, consider the Hoo-Koo-E-Koo Fire Road Trail – Bon Tempe Dam loop from Fairfax, which covers over 41 km with significant elevation gain.
Rules for dogs in open space preserves can vary. Generally, dogs are permitted on trails but must be kept on a leash. It's always best to check the specific regulations of the Marin County Open Space District for White Hill Preserve before your visit to ensure compliance.
Yes, the preserve boasts diverse natural environments, including varied woodlands with coast live oak, California bay, and redwood trees, as well as open grasslands and chaparral-covered hills. Higher elevations reveal unique serpentine rocks and rare plants. There's also a historical B-17 bomber crash site from 1946.
Many of the mountain bike routes in the preserve are designed as loops, allowing for varied explorations. A popular moderate loop is the Porcupine Trail – Camp Tamarancho Trailhead loop from Woodacre, offering a mix of fire roads and singletrack.
The area is highly rated by the komoot community, with an average score of 4.7 stars from over 170 reviews. Reviewers often praise the diverse terrain, from varied woodlands to challenging singletrack, and the extensive network that connects to adjacent preserves, offering endless exploration possibilities.
While the preserve is primarily accessed by car, some areas might be reachable via Marin Transit routes. It's advisable to check specific bus schedules and stops that align with trailheads, particularly those near Fairfax or Woodacre, for the most up-to-date public transport information.
Parking is available at various trailheads around the preserve. Common access points are often found off Sir Francis Drake Blvd. and near towns like Woodacre and Fairfax. Specific parking details can usually be found on local park authority websites or within komoot tour descriptions.
Most trails within White Hill Open Space Preserve do not require a special permit for mountain biking. However, some adjacent trail systems, such as certain trails within Camp Tamarancho, are permit-only. Always check the specific rules for any trails you plan to ride, especially if venturing into connected preserves.
The preserve features a rich variety of plant life. You'll encounter varied woodlands with coast live oak, California bay, and redwood trees. Higher elevations showcase stands of manzanita and chamise. In spring, the area bursts with wildflowers like iris, lupines, California poppy, and blue larkspur.


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