Sausalito — Mill Valley Path – Bothin Marsh Preserve loop from Marin City
Sausalito — Mill Valley Path – Bothin Marsh Preserve loop from Marin City
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(2704)
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Sausalito — Mill Valley Path – Bothin Marsh Preserve loop from Marin City
02:21
31.9km
600m
Gravel riding
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.
Last updated: June 8, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Waypoints
Start point
Bus stop
Get Directions
546 m
Sausalito — Mill Valley Path
Highlight (Segment) • Cycleway
Tip by
2.55 km
Bothin Marsh Preserve
Highlight • Natural
Tip by
7.76 km
West Blithedale Avenue Trailhead
Highlight • Trail
Tip by
10.7 km
Old Railroad Grade Trail Gate Overlook
Highlight • Viewpoint
Tip by
10.8 km
Railroad Grade at Fern Canyon & Summit
Highlight • Trail
Tip by
13.4 km
Old Railroad Grade: Blithedale to Gravity Car
Highlight • Trail
Tip by
15.2 km
Railroad Grade Fire Road Overlook to San Francisco
Highlight • Viewpoint
Tip by
15.9 km
Flowy downhill section above Laguna Creek
Highlight • Trail
Tip by
31.9 km
End point
Bus stop
Way Types & Surfaces
Way Types
14.3 km
10.6 km
6.08 km
918 m
Surfaces
15.0 km
10.1 km
6.63 km
137 m
< 100 m
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Elevation
Highest point (520 m)
Lowest point (0 m)
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Weather
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Today
Saturday 27 June
19°C
13°C
18 %
Additional weather tips
Max wind speed: 27.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Description
If you're looking for a gravel biking route that offers a unique blend of paved pathways and access to more rugged terrain, the Sausalito — Mill Valley Path – Bothin Marsh Preserve loop from Marin City is a difficult 19.8 miles (31.9 km) journey with 1979 feet (603 metres) of climbing, typically completed in about 2 hours and 21 minutes. This route is best suited for experienced gravel riders who appreciate diverse scenery and are prepared for varied surfaces, serving as a gateway to Marin County's extensive gravel networks.
What to expect on Sausalito — Mill Valley Path – Bothin Marsh Preserve loop from Marin City
The route begins on the Mill Valley-Sausalito Multiuse Pathway, which is predominantly a wide, flat, and paved asphalt path. While this section is easygoing, the overall 'difficult' rating for this loop comes from its integration with more challenging gravel opportunities found elsewhere in Marin County. You'll be treated to stunning views of Richardson Bay and the majestic Mount Tamalpais, especially as you traverse the Bothin Marsh Preserve, a vital tidal sanctuary known for its abundant migratory bird life. As you near Sausalito, the path offers glimpses of a unique houseboat neighborhood and distant views of San Francisco and the Golden Gate Bridge, making for a truly scenic ride that transitions from urban edge to natural wetland.
Planning your visit
Parking is generally available near the Marin City start point, though arriving earlier in the day is advisable, particularly on weekends. Be aware that sections of the path through Bothin Marsh are increasingly impacted by sea level rise, leading to flooding during king tides; check local conditions before you go. This route is enjoyable year-round, but the best time to experience the full beauty of the marsh and bay views is during the dry season, when dirt trails within the preserve might also be more accessible.
Trail details
- Distance: 19.8 miles (31.9 km)
- Elevation gain: 1979 feet (603 metres)
- Difficulty: difficult
- Estimated time: 2 hours and 21 minutes
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