Tips
Traveler
December 8, 2016
Mountain biking
San Geronimo Ridge Fire Road extends from Peter’s Dam to the end of Samuel P Taylor State Park, making it among the most scenic (and longest) fire roads in Marin.
Hikers, bicyclists, and equestrians wishing to link together longer outings use this gravel dirt road that connects with White’s Hill and Cascade Canyon preserves, as well as many popular trails and roads in the MMWD watershed. It runs on a ridge with spectacular views above Kent Lake to the west and for about 5 miles through Gary Giacomini Open Space Preserve to the east.
Hikers, bicyclists, and equestrians wishing to link together longer outings use this gravel dirt road that connects with White’s Hill and Cascade Canyon preserves, as well as many popular trails and roads in the MMWD watershed. It runs on a ridge with spectacular views above Kent Lake to the west and for about 5 miles through Gary Giacomini Open Space Preserve to the east.
brucehamilton8758
October 9, 2025
Mountain biking
Quite a bit of elevation climbing on this loop, sure does help having a class 1 e-bike at 67 yrs. Loved the ride!
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Nearby routes
Best routes near San Geronimo Ridge
5.0
(1)
7
riders
34.9km
03:40
970m
970m
This difficult 21.7-mile mountain biking loop offers challenging climbs, rewarding descents, and diverse scenery in the Mount Tamalpais Wate
Hard
Details
Informations
Distance 10.1 km
Uphill 460 m
Downhill 100 m
Weather
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Thursday 12 November
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12°C
14 %
Additional weather tips
Expect light wind and shifting conditions.
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