Golden Gate Park has a portion of it closed every weekend so people can skate without having to worry about cars; and it just hosted the annual Hardly Strictly Blue Grass Festival. And then there is Ocean Beach, a great place to jog, walk, sit and watch surfers- we used to have late night bonfires there, but not sure if they are allowed any more.. And then there are the little hidden gems, like Baker's Beach and Land's End. Or Kite Hill. Or Buena Vista Park. Or Glen Park with its ropes course and paths . The list goes on an on.
Finally, if you are interested in the parks within the financial district (oh yes, they do exist) there is guy who gives tours of them. They are fascinating, but the only trick is you have to see them mid week when the buildings through which most are accessed are open.
Astrid Lacitis, Keynote Properties, 415 860 0765