From Petaluma:

From the Central Petaluma intersection
Go south on South Main Street (about 3 blocks)
Take D Street west
D Street becomes the Point Reyes Petaluma Road
Follow it for many miles
just before the Nicasio resevoir
Left on Nicasio Vy Rd where it T's into Point Reyes Petaluma Road
Pass through Nicasio
Pass Lucus Valley Rd and go 3.5 miles further on Nicasio
Right on Sir Francis Drake, go about a quarter mile
Pass the San Geronimo Cultural Center on R
Right on Lagunitas School Road
Park in Lagunitas School Lot (until 6am) or
Park on Lagunitas Shool Road if you are staying past 7am
to help clean up on Monday

Shuttle vans will pick up at Lagunitas School parking lot.
It takes each shuttle about 10 minutes round trip to the Grove.

If you don't see one for 15 min you can call 662-2686.
Cell phones (at least Cingular) may work on Lagunitas School Road.
Or there is a pay phone at the San Geronimo Cultural Center,
east end (right-hand side) of the building near the toilets.

Grove Location on Bay Area Map

Alternate Route: from the North on 101S

From San Francisco , or from San Rafael

From Bioneers