Purisima Creek Redwoods, an hour south of San Francisco, is the Mt. Tam of the Peninsula. The parking lot is full, the open space preserve is busy, but as soon as you put in some mileage and hike toward the summit, you only see ripped mountain bikers with true grit. Can’t say I’d go again, I was rather bored with the redwood scenery that never changed despite the several hour hike. But the centipede and banana slug were pretty awesome.