From San Francisco or San Francisco International Airport:

By Bus:

From the Transbay Terminal at First and Mission Streets, take AC Transit bus O or W, which stop at 5^th Street and Washington Street near Jack London Square.

By BART (Bay Area Rapid Transit):

Take a Richmond or Pittsburg/Bay Point train to the 12^th Street Station in Oakland.  (Get a BART to Bus Transfer upon leaving.)  Go to the S.W. corner of Broadway and 14^th Street.  Take an AC Transit bus #72/72 San Pablo.  Show transfer to the driver.  Get off at Embarcadero and Broadway.  Or take the #51/51 Broadway bus to 7^th Street and Franklin.

From North Oakland:

By Bus:

Take AC Transit bus #1R, transfer to #11, transfer to #72.

From Hayward and points east:

By Bus:

Take AC Transit bus #97 to Bayfair Mall; transfer to bus #1R; transfer to bus #51.

By BART:

Take a Daly City or Richmond train to Lake Merritt Station, or a Richmond train to 12^th St. Oakland Station.

From Oakland Airport and points south:

By Bus:

Take AC Transit bus #50, transfer to the O line bus.

By BART:

Take the AirBart shuttle to the Coliseum Station, take a Daly City or Richmond train to Lake Merritt Station, or a Richmond train to 12^th St. Oakland Station

Additional Travel Information: 

511: Bay Area Travel Guide

511 is a phone and Web service that provides information on traffic conditions, 
details on public transportation routes and fares, carpools, bicycling information 
and more. www.511.org

From Alameda, Contra Costa Marin, Napa, San Francisco, San Mateo, 
Santa Clara, Solano, and Sonoma: dial 511

Alameda-Contra Costa Transit (AC Transit) www.actransit.org
Phone: dial 511 and ask for AC Transit

Bay Area Rapid Transit (BART) www.bart.gov
Oakland/Berkeley/Orinda: (510) 465-2278
San Francisco/Daly City: (415) 989-2278
South San Francisco/San Bruno/San Mateo: (650) 992-2278
Concord/Walnut Creek/Lafayette/Antioch/Pittsburg/Livermore: (925) 676-2278
Hayward/San Leandro/Fremont/Union City/Dublin/Pleasanton: (510) 441-2278
Richmond/El Cerrito: (510) 236-2278

San Mateo County Transit (SamTrans) www.samtrans.org
From (408), (415), (510), (650), (707), (831) and (925): dial (800) 660-4287
From all other area codes: (510) 817-1717.