The best MTB trails in Alto Bowl Open Space Preserve

102rides

4.7

(104)

1,494 people rode here

Looking for the best mountain biking routes in Alto Bowl Open Space Preserve? Then browse our collection of mtb rides around this beautiful natural park in Marin County below — and discover more of on your next visit.

Old Mine Trail (lower) 🌲 – Old Springs Trail loop from Mill Valley	Expert 04:46 49.6km
Fern Creek and spring loop from Mill Valley	Expert 04:04 41.9km
Bobcat Trail – Marincello Trail loop from Mill Valley	Intermediate 02:45 30.8km
Hoo-Koo-E-Koo Fire Road Trail – Blithedale Ridge Fire Rd 🗻🚵 loop from Mill Valley	Intermediate 02:12 23.2km

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Map data © OpenStreetMap contributors
1
1
Old Mine Trail (lower) 🌲 – Old Springs Trail loop from Mill Valley
04:46
49.6km
10.4km/h
1,210m
1,210m
Expert
4.9
(17)
113
Expert mountain bike ride. Very good fitness required. Suitable for all skill levels.
Map data © OpenStreetMap contributors
2
2
Fern Creek and spring loop from Mill Valley
04:04
41.9km
10.3km/h
1,050m
1,050m
Expert
4.5
(4)
73
Expert mountain bike ride. Very good fitness required. Suitable for all skill levels.

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Map data © OpenStreetMap contributors
3
3
Bobcat Trail – Marincello Trail loop from Mill Valley
02:45
30.8km
11.2km/h
660m
660m
Intermediate
5.0
(2)
49
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.
Map data © OpenStreetMap contributors
4
4
Hoo-Koo-E-Koo Fire Road Trail – Blithedale Ridge Fire Rd 🗻🚵 loop from Mill Valley
02:12
23.2km
10.5km/h
600m
600m
Intermediate
5.0
(2)
17
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.