As you exit Interstate 5, go west and immediately turn right onto Del Puerto Canyon Road. Further west, the canyon narrows sharply, the curves tighten and second gear is often required. As the road climbs, the pavement is not in very good shape, but the quality improves once you reach the Santa Clara County line. At The Junction, you could turn right and go back to Livermore, 31 miles away, but it’s more fun to turn left onto San Antonio Valley Road towards San Jose.After a short rest, keep going west toward San Jose on Mount Hamilton Road. More tight and twisty stuff, all downhill. The road is quite narrow, and unfortunately the pavement is in fairly bad shape, so take it easy. It can get crowded on the weekends. Enjoy the view if you can, and practice heel and toeing on the down shifts.
Patterson Via Mt. Hamilton
Mt. Hamilton from Patterson
Another trip via Mt. Hamilton from Patterson. From Porsche Club of America