Al tracked down some info on spectating along Sierra Road, which is the site of the Tour of California's first big category 1 climb:

• there is no public car parking along Sierra Road
• Sierra Road will be closed to car traffic beginning at 9am on Tuesday
• bicycle traffic will be allowed until 15 minutes before the racers arrive
• There are several places where you can park near the bottom of the hill and there is also a light rail station nearby.

It would appear that Al and I will be testing our own legs in ascending the climbs ourselves. My photos will be evidence of how far we make it up. The official Stage 2 info page estimates the actual arrival time on Sierra Road between 1:45 and 2:13PMm, with the San Jose finish about 40 minutes after that.