If you're on an extended tour, where are you heading next? Down the coast? Down the Bay-side?

Down the coast the route is pretty obvious. It's 1. But when you see a tunnel, stop and turn into the little parking lot. The old Devil's Slide road is open for walking and biking, and bypasses the tunnel.

If you're going South down the Peninsula (which is nice, but I don't know why you wouldn't choose the coast), angling towards 35 and then Canada road is much nicer than riding near the Bay, which is flat but industrial.

If you have planned stops or goals going down-Peninsula, I can try to offer suggestions. Sadly, covid and fires combine such that trails (to bypass biking on the 280 freeway) being open and water availability are changing every day.