Lots of loops on Pine mtn and Mt Tam. The best legal ride might be down Eldridge. Avoid busy weekends. Everyone hates fireroads but this is an epic fireroad jaunt worthy of your time. Ranges from deep redwood forests to scrub brushy plants.
Climbs are ugly and descents are a blast.
Hikers are rare and visibility good. So you can hammer without fear. Do ride smart and respectfully as hikers and equestrians do exist.