The best running trails in Thornewood Open Space Preserve
4.9
(15)
1,633
runners
62
runs
Last updated: November 8, 2025
35
runners
1. Bear Gulch Trail (Meadow) loop from Woodside
16.0km
02:13
570m
570m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6
runners
2. Running loop from Woodside
5.10km
00:43
200m
190m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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1
runners
3. Tripp Road via Woodside Road loop — Woodside
5.29km
00:36
30m
30m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
59
runners
4. Running loop from Portola Valley
23.2km
03:07
840m
840m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
7
runners
5. Borel Hill loop from Portola Valley
28.5km
03:44
770m
770m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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