Take Highway 116 westwards out of Guerneville and you'll reach the pacific ocean (and the town of Jenner) in 13 miles (20 minutes driving time.)
Beachcomb or hike the rugged coastline--dress warmly & watch out for sneaker waves!
http://www.sonoma-coast-state-park.com/
Some state parks are closed due to budget cuts. Make sure to check to find an open access area:
http://www.parks.ca.gov/?page_id=451
We recommend checking out the views and beach at Goat Rock, reached by taking a left onto Highway 1 before you reach Jenner:
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