From the south:

 

From Highway 101 take San Anselmo/Sir Francis Drake exit heading west. Stay on Sir Francis Drake through San Anselmo and Fairfax until you see the San Geronimo Golf course. Turn right onto Nicasio Valley Road. Follow road toward Nicasio; shortly before Nicasio there is a large horse stable on the left called Windfield Station. Turn in here and park.

 

 

From the north:

 

From 101 take the Lucas Valley Road exit (just before San Rafael), follow Lucas Valley Road until it dead ends at Nicasio Valley Road. Turn right, go one-tenth of a mile and turn left into Windfield Station.