I've flown out of 5 of them - SF, Oakland, San Jose, Palo Alto, San Carlos. You can't land a 747 on all of them but they're definitely airstrips. There might ev

I've flown out of 5 of them - SF, Oakland, San Jose, Palo Alto, San Carlos. You can't land a 747 on all of them but they're definitely airstrips. There might even be more than mapped.