The best road cycling routes in San Pedro Mountain Open Space Preserve
4.6
(120)
6,331
riders
87
rides
Last updated: October 25, 2025
5.0
(5)
380
riders
1. Nicasio Reservoir loop from Marin Civic Center — Marin County
80.2km
03:50
980m
980m
Expert road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(4)
196
riders
2. Fairfax – San Geronimo Valley Bikeway loop from Marin Civic Center
86.8km
04:09
950m
950m
Expert road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
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4.2
(5)
166
riders
Intermediate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(4)
83
riders
4. Nicasio – Stafford Lake Park loop from Marin Civic Center
61.4km
02:41
580m
580m
Intermediate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
67
riders
5. Alpine Lake – Alpine Dam loop from Marin Civic Center
63.1km
03:28
1,230m
1,230m
Expert road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
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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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