I bicycled to Angel Island (via ferry) over the long holiday week-end. It was a typical July day on the San Francisco Bay — patches of brilliant sunshine mixed with belts of fog and massive wind gusts, due to cold ocean air being sucked into warmer inland areas.
The image above was made on the SW side of the island below the summit of Mount Caroline Livermore (El. 788′). Note downtown SF, Alcatraz, and the Golden Gate Bridge in the background. (You can click on the image for an expanded view).
(Wikipedia fact: Angel Island was part of the mainland until about 10,000 years ago, when sea levels rose as the last ice age came to an end.)