To bike up to the peak of Mount Tam  is a watermark of local bicyclists’ strength and endurance. Rather than driving up to the East Peak or the Mountain Home Inn, sturdy cyclists pedal up the paved road to the East Peak.
It’s a long, hard ride, but for an experienced cyclist the challenge and the views make it more than worthwhile. And then comes the fun part—whizzing back down the twisting roads at (safe) high speeds! Just take care, since this road is open to cars, many of which may not realize that bikers frequent the area.
On the other hand, mountain bikers carry their machines up the mountain on racks, then take them up and down Mount Tam’s  extensive network of fire roads (open to hikers, bikers, and horseback riders). Check the park map to find a great loop!