The best MTB trails in Thornewood Open Space Preserve (Closed Area)

52rides

4.8

(78)

1,164 people rode here

Looking for the best mountain biking routes in Thornewood Open Space Preserve (Closed Area)? Then browse our collection of mtb rides around this beautiful natural park in San Mateo County below — and discover more of on your next visit.

Ridge Trail – Borel Hill loop from Portola Valley	Expert 03:08 30.3km
Arastradero Lake loop from Portola Valley	Intermediate 01:42 27.3km
Manzanita Trail – Middle Timberview Trail loop from Woodside	Intermediate 02:53 24.2km
Stevens Creek Nature Trail loop from Portola Valley	Expert 03:27 27.3km

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Map data © OpenStreetMap contributors
1
1
Ridge Trail – Borel Hill loop from Portola Valley
03:08
30.3km
9.7km/h
800m
800m
Expert
17
Expert mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
Map data © OpenStreetMap contributors
2
2
Arastradero Lake loop from Portola Valley
01:42
27.3km
16.0km/h
320m
320m
Intermediate
5
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.

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Map data © OpenStreetMap contributors
3
3
Manzanita Trail – Middle Timberview Trail loop from Woodside
02:53
24.2km
8.4km/h
900m
900m
Intermediate
4.6
(9)
180
Intermediate mountain bike ride. Good fitness required. Advanced riding skills necessary.
Map data © OpenStreetMap contributors
4
4
Stevens Creek Nature Trail loop from Portola Valley
03:27
27.3km
7.9km/h
730m
730m
Expert
5.0
(2)
31
Expert mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.