Howdy - hope I'm not to late getting back to you - Just take BART (Bay Area Rapid Transit) train right from the airport, and get off at the Downtown Berkeley station, which links up with a number of AC Transit bus lines that can get you down to Aquatic Park, where the course is. BART trip will take about an hour and cost 5.65 each way. Not sure on the bus part, but you can check the web sites on both if you want - www.bart.gov
, and www.actransit.org
, for more info.
Hope the weather behaves for you - enjoy!