4.6
(25)
641
riders
48
rides
Gravel biking in Baltimore Canyon Open Space Preserve offers diverse terrain through redwood and Douglas fir forests. The preserve features shaded trails, the picturesque Larkspur Creek, and the 30-foot Dawn Falls. Routes often involve significant elevation gains, with some portions requiring advanced riding skills. The landscape includes varied woodlands, chaparral, and opportunities for panoramic views of the Bay Area.
Last updated: May 20, 2026
5.0
(1)
18
riders
20.8km
01:30
310m
310m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
8
riders
38.1km
03:43
1,190m
1,190m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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7
riders
27.1km
01:59
580m
580m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
53
riders
37.7km
03:08
1,000m
1,000m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
18
riders
20.5km
01:49
540m
540m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Baltimore Canyon Open Space Preserve
Mount Tam East Peak offers some of the most majestic views north of the bay. From this vantage point, you can see all of Marin, along with Point Reyes to the north and Oakland and San Francisco to the south. The stunning panoramic vistas make the journey well worth the effort. There are restrooms and picnic tables, ideal for a snack or lunch while you capture some incredible photos.
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West of Lake Lagunitas, Bon Tempe Lake is a reservoir managed by Marin Municipal Water District. It features striking scenery, with lush trees, clear water, and a peaceful atmosphere.
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At this point on Sky Oaks Road, there is a junction with Shaver Grade Road, which connects with a dense network of trails and dirt roads near Bald Hill in the Mount Tamalpais State Park. From here, you can continue on the paved Sky Oaks Road or go arond the gate on to the gravel Shaver Grade Road.
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This paved bike trail runs through the College of Marin Campus along the Corte Madera Creek. This is a great trail for students and commuters, as well as cyclists looking for a traffic-free shortcut through the area.
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Pantoll Road is a beautiful, mostly paved route through Mount Tamalpais State Park, connecting the Panoramic Highway to Ridgecrest Boulevard. It winds closely along the curves of the hillside, with some shade from the trees in some spots. There are fantastic views along the way of San Francisco and the Marin Headlands, with incredible viewpoints over the Pacific coastline.
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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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You'll find a diverse mix of terrain, primarily shaded forest trails winding through towering redwood and Douglas firs. Many routes follow the picturesque Larkspur Creek. The preserve also features varied woodlands, chaparral, and fire roads suitable for biking. Expect a mix of mostly paved surfaces with gravel sections.
Yes, a notable attraction is Dawn Falls, a 30-foot cascading waterfall that is particularly impressive after heavy winter rains. While not directly on every gravel route, it's a popular scenic turnaround point. For panoramic views, side trips like the King Mountain Loop can offer vistas of the Bay Area, including the Richmond San-Rafael Bridge and even San Francisco on clear days.
The preserve offers a range of routes from moderate to difficult. While there is 1 easy route, you'll find 18 moderate and 38 difficult routes. Many routes involve significant elevation gains, from 1,000 feet up to over 3,000 feet, requiring varying levels of fitness. Some of the more strenuous options may even necessitate pushing your bike on certain sections.
The komoot community highly rates the routes in Baltimore Canyon Open Space Preserve, with an average score of 4.6 stars from over 10 reviews. Nearly 600 gravel bikers have used komoot to explore the varied terrain, often praising the shaded redwood forests, the scenic Larkspur Creek, and the challenging yet rewarding climbs.
Yes, there are several excellent loop options. A popular moderate choice is the Phoenix Lake – Fish Gulch trail junction loop from Larkspur, which is about 20.4 km long. For a more challenging ride, consider the Camino Alto summit viewpoint – Camino Alto Road loop from Larkspur, covering 26.9 km with significant elevation.
Spring brings an array of wildflowers, particularly near the Hoo-Koo E-Koo Fire Road Trail, making it a beautiful time to visit. Autumn offers vibrant colors from the big-leaf maples. Winter rains can make Dawn Falls particularly impressive, but be aware that some sections can be muddy during the rainy season. The shaded forest trails are especially pleasant during warmer months.
Beyond the natural beauty, the preserve holds historical interest with remnants of an old quarry. You can also explore various trails like the Indian Fire Road trail or the Blithedale Ridge Fire Rd, which offer unique perspectives of the area. The Ladybug Trail - Dawn Falls Trail junction is another notable spot.
Absolutely. For experienced riders seeking a significant challenge, the Lagunitas Trail loop from Corte Madera is a demanding option, stretching 38 km with nearly 1200 meters of elevation gain. Another difficult route is the Railroad Grade Fire Road loop from Mill Valley, which covers 24.5 km with over 600 meters of climbing.
The diverse woodlands and chaparral of Baltimore Canyon Open Space Preserve support various wildlife. While specific sightings can vary, you might encounter deer, various bird species, and smaller mammals. Riders are encouraged to be observant and respectful of the natural habitat.
While direct public transport to trailheads within the preserve might be limited, the preserve is accessible from nearby towns like Larkspur and San Anselmo, which may have public transport connections. It's advisable to check local bus routes or ride-sharing options to reach the general vicinity, then cycle to your chosen trailhead.
Yes, the nearby towns of Larkspur and San Anselmo offer various cafes, restaurants, and pubs where you can refuel after your ride. These towns are just a short distance from the preserve's access points and provide a good selection of dining options.
Gravel biking in Baltimore Canyon Open Space Preserve often involves significant elevation changes. Routes can feature elevation gains ranging from approximately 300 meters (like the Phoenix Lake – Fish Gulch trail junction loop from San Anselmo) up to over 1100 meters for the most challenging routes, such as the Lagunitas Trail loop from Corte Madera.


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