Bothin Marsh Preserve – Pantoll Road loop from Muir Beach

Bothin Marsh Preserve – Pantoll Road loop from Muir Beach

Hard

2.6

(15)

riders

Bothin Marsh Preserve – Pantoll Road loop from Muir Beach

04:29

49.9km

1,340m

Gravel riding

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: September 26, 2026

Tips

Includes a very steep uphill segment

You may need to push your bike.

After 49.7 km for 109 m

Waypoints

Start point

Parking

Get Directions

10.1 km

Tennessee Valley 🌲 Charles F McGlashan Pathway

Highlight (Segment) • Cycleway

Starting as a wooden boardwalk branching off from the Sausalito-Mill Valley Bike Trail, the Charles F McGlashan Pathway crosses the busy Hwy 1 and then parallels Tennessee Valley Road

Tip by

11.7 km

Bothin Marsh Preserve

Highlight • Natural

This tidal sanctuary runs along the Mill Valley-Sausalito Pathway and the Charles F. McGlashan Pathway. More than 400 species of migratory birds rest here after their long flights, and if …

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19.8 km

Old Railroad Grade Trail Gate Overlook

Highlight • Viewpoint

Sweeping views south and east, all the way to SF, and Mt Tam right above behind you to the north. The bench is dedicated to the family who built their house in front of you 60 years ago.

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19.9 km

Railroad Grade at Fern Canyon & Summit

Highlight • Trail

Uphill from this intersection a portion of the Railroad Grade has been taken over by Fern Canyon Rd after the Mt Tam railroad closed. A short distance uphill on pavement …

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24.3 km

Railroad Grade Fire Road Overlook to San Francisco

Highlight • Viewpoint

On clear days views open up along the trail across the bay and including the San Francisco skyline

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25.0 km

Flowy downhill section above Laguna Creek

Highlight • Trail

After looping around West Point the Railroad Grade trail snakes through open and tree-lined sections with fun curves.

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25.3 km

Mount Tamalpais West Point

Peak

25.4 km

Old Railroad Grade Trail (upper half) — Mt Tam

Highlight (Segment) • Trail

Old Railroad Grade trail follows the route of the railroad that reached the peak of Mount Tam from Mill Valley (and a spur to Muir Beach) between 1896 and 1930. …

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38.5 km

Pantoll Road in Mount Tamalpais State Park connects Panoramic Highway at the Pantoll Ranger Station/Campground trailhead ( bahiker.com/northbayhikes/pantoll.html ) with Ridgecrest Boulevard at Rock Springs trailhead. It is a mostly …

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49.9 km

End point

Parking

Way Types & Surfaces

Way Types