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Mountain biking trails

Hoo-Koo-E-Koo Fire Road Trail – Fern Creek and spring loop from Mill Valley

Routes

Mountain biking trails

Hoo-Koo-E-Koo Fire Road Trail – Fern Creek and spring loop from Mill Valley

Moderate

3.2

(22)

riders

Hoo-Koo-E-Koo Fire Road Trail – Fern Creek and spring loop from Mill Valley

02:48

27.8km

760m

Mountain biking

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: April 21, 2026

Tips

Includes a segment in which cycling is not permitted

After 27.1 km for 167 m

Waypoints

Start point

Bus stop

Get Directions

3.18 km

West Blithedale Avenue Trailhead

Highlight • Trail

The wood bridge across the creek marks the beginning of the Old Railroad Grade, today a wide fireroad

Tip by

5.81 km

Hoo-Koo-E-Koo Fire Road Trail

Highlight (Segment) • Trail

The Hoo-Koo-E-Koo Fire Road skirts the east side of Mount Tamalpais; its winding route features stunning scenic views of San Francisco Bay and the Marin peninsula. Some say the trail …

Tip by

9.13 km

Old Railroad Grade: Blithedale to Gravity Car

Highlight • Trail

Bottom section of the most gradual route to Mt Tam summit, following the former tourist train that worked it's way up from Mill Valley til the 1930s

Tip by

10.5 km

Fern Creek and spring

Highlight • River

Delicious water emerging from the rock wall just past the creek along the fire road

Tip by

10.9 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

Tip by

11.6 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.

Tip by

11.9 km

Mount Tamalpais West Point

Peak

12.9 km

Railroad Grade Fire Road

Highlight • Trail

This is a great gravel road that takes you from the summit of Mount Tam to West Point. The road is wide and not very technical, but the views south across the foothills to Muir Woods are fantastic.

Tip by

14.2 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. …

Tip by

27.8 km

End point

Bus stop

Way Types & Surfaces

Way Types

18.5 km

5.50 km

2.19 km

1.49 km

204 m

Surfaces

12.4 km

5.28 km

4.21 km

3.91 km

1.93 km

115 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Weather

Saturday 16 May

23°C

13°C

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Hoo-Koo-E-Koo Fire Road Trail – Fern Creek and spring loop from Mill Valley

West Blithedale Avenue Trailhead

Hoo-Koo-E-Koo Fire Road Trail

Old Railroad Grade: Blithedale to Gravity Car

Fern Creek and spring

Railroad Grade Fire Road Overlook to San Francisco

Flowy downhill section above Laguna Creek

Railroad Grade Fire Road

Old Railroad Grade Trail (upper half) — Mt Tam

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