4.5
(247)
2,575
riders
117
rides
Mountain biking in Baltimore Canyon Open Space Preserve offers a varied landscape characterized by shaded forests of redwoods and Douglas firs, diverse woodlands, and a network of multi-use fire roads. The preserve features significant elevation changes, with trails often skirting along Larkspur Creek. Riders can explore gravel fire roads like the Indian Fire Road and the Hoo-Koo-E-Koo Fire Road, which provide scenic views of San Francisco Bay and the Marin peninsula. The trail network connects to adjacent parklands like Mount…
Last updated: April 27, 2026
4.8
(8)
111
riders
24.0km
02:39
750m
750m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.9
(7)
46
riders
16.8km
01:39
370m
370m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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7
riders
18.0km
02:00
530m
530m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
5
riders
13.0km
01:14
320m
320m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
43
riders
35.1km
03:39
950m
950m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
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Popular around Baltimore Canyon Open Space Preserve
Great stop over along the trails on Mount Tam at the intersection of Old Railroad Grade, Old Stage, and Nora trails. Sit and enjoy the views from the wrap-around porch of this former hotel/restaurant built over 100 years ago when 'the crookedest railroad' carried weekend tourists up to the summit of Mount Tam. Today volunteers maintain the idyllic inn, provide hiking information and self-serve honor-based snacks and refreshments.
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There is a great view of the northern point of Alpine lake where a small channel feeds over to Bon Tempe Lake. This is a great place to drop a line, or just enjoy the aquatic views.
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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
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I don’t think I’ve actually seen much water in this trough, if biking up from phoenix lake, this is a nice place to catch your breath on this climb before finishing it off and descending down to Lake Lagunitas.
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On Shaver Grade Road, you get to ride along the incredibly blue waters of Phoenix Lake.
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After looping around West Point the Railroad Grade trail snakes through open and tree-lined sections with fun curves.
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On clear days views open up along the trail across the bay and including the San Francisco skyline
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There are over 125 mountain bike trails in Baltimore Canyon Open Space Preserve, offering a wide range of options for different skill levels. You'll find everything from easy paths to more challenging routes with significant elevation changes.
The preserve features a varied landscape with shaded forests of redwoods, Douglas firs, maples, and madrone trees. Trails often skirt along Larkspur Creek, and many are wide fire roads. You'll encounter a mix of gradual paths and areas with substantial climbs, connecting to broader trail systems in Marin County.
Yes, the preserve offers several easier routes suitable for families. While specific 'family-friendly' designations aren't always explicit, routes with less elevation gain and wider fire roads are generally more accessible. For a moderate option, consider the Marin Three Lakes loop, which winds through varied terrain.
The preserve is enjoyable year-round. During warmer months, the dense, shaded forests provide a cool atmosphere. In winter, after significant rainfall, the trees are covered in lush moss, and seasonal waterfalls like Dawn Falls are at their most impressive. Spring brings wildflowers, and autumn offers vibrant colors from the big-leaf maples.
Absolutely. You can ride along Larkspur Creek, which flows vigorously after winter rains. A prominent natural attraction is Dawn Falls, a 30-foot waterfall that is particularly impressive after significant rainfall. You can find a trail junction leading to it at Ladybug Trail - Dawn Falls Trail junction. The Hoo-Koo-E-Koo Fire Road Trail also offers stunning scenic views of the San Francisco Bay and the Marin peninsula.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 300 reviews. Mountain bikers often praise the diverse terrain, the cool, shaded forests, and the connectivity to a broader network of trails that allow for extended rides and varied experiences.
Yes, several routes provide excellent views. The Old Railroad Grade and Hoo-Koo-E-Koo Loop offers scenic views of the San Francisco Bay and the Marin peninsula. Additionally, the King Mountain Loop (accessible via connections) is known for panoramic views of the surrounding valley, the San Francisco Bay Area, and even the Richmond-San Rafael Bridge.
Yes, many of the mountain bike routes in Baltimore Canyon Open Space Preserve are loops, allowing for a continuous ride without retracing your steps. Examples include the Old Railroad Grade and Hoo-Koo-E-Koo Loop and the Phoenix Lake – Fish Gulch trail junction loop from Ross.
The preserve offers a range of difficulties. While there are 11 easy routes, the majority (78) are moderate, and 36 are considered difficult. This means you can find trails suitable for beginners looking for gradual paths, as well as more experienced riders seeking routes with significant climbs and elevation changes, such as the Mount Tamalpais West Point loop from Sausalito.
Yes, a key feature of Baltimore Canyon Open Space Preserve is its excellent connectivity. It links to adjacent parklands like King Mountain, Blithedale Summit, and Mount Tamalpais. This allows for extended rides and more challenging routes, integrating into the broader Marin County trail network.
Many fire roads within the preserve are excellent for mountain biking. The Hoo-Koo-E-Koo Fire Road Trail is a popular winding route with scenic views. The Indian Fire Road trail offers initial climbs and descents along a ridgeline. The Southern Marin Line Rd Trail is a wide forest road passing through pleasant redwood groves.
Ride durations vary significantly based on the trail and your pace. For example, the Old Railroad Grade and Hoo-Koo-E-Koo Loop typically takes around 2 hours and 39 minutes, while the longer Mount Tamalpais West Point loop from Sausalito can take about 3 hours and 14 minutes.


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