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Routes
Gravel rides
United States
California
San Mateo County

Thornewood Open Space Preserve

The best gravel rides in Thornewood Open Space Preserve

4.5

(3)

30

riders

12

rides

Experience the rugged beauty of gravel biking with our curated list of gravel rides in Thornewood Open Space Preserve. Whether you're looking for challenging climbs or scenic trails, here are some of the best gravel bike routes in Thornewood Open Space Preserve.

Last updated: November 22, 2025

3

riders

1. Old La Honda Road – Portola Road loop from Portola Valley

13.9km

01:26

440m

440m

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Moderate

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate
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Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Moderate

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
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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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Browse the best Gravel rides in other regions.

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