Nicasio Valley Loop

  21.5 miles, probably about 1500 feet of climbing.

I generally do this Lagunitas to Nicasio Valley Road, out through Nicasio, around the reservoir, south on Point Reyes-Petaluma Road to Platform Bridge Road, then the bike path back through Samuel P. Taylor State Park to Sir Francis Drake Boulevard, and back over Shafter Bridge to Lagunitas.

Google Maps view of route