The best MTB trails in Horse Hill Open Space Preserve
4.7
(133)
1,931
riders
104
rides
Last updated: October 7, 2025
5.0
(2)
17
riders
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.9
(20)
110
riders
2. Mount Tamalpais & Coastal Trail loop — Mount Tamalpais State Park
35.4km
03:20
840m
840m
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.
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4.9
(20)
132
riders
3. Old Mine Trail (lower) 🌲 loop from Mill Valley
45.0km
04:17
1,080m
1,080m
Expert mountain bike ride. Very good fitness required. Suitable for all skill levels.
4.5
(4)
72
riders
4. Railroad Grade Fire Road – Fern Creek and spring loop from Mill Valley
42.1km
04:05
1,050m
1,050m
Expert mountain bike ride. Very good fitness required. Suitable for all skill levels.
5.0
(2)
49
riders
5. Bobcat Trail – Marincello Trail loop from Mill Valley
30.8km
02:45
660m
660m
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.
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