Many entertainments over that route included:
Wile E. Coyote's mailbox.
Riding under the spaghetti tangle of ramps going into SFO. It is surprisingly easy to get through the airport on a bike, and I even saw helpful signs directing one towards airport bike parking.
Views of airplanes from the edge of the SFO runway, a helicopter taking off at the airport near the Hiller air museum, and low-flying small planes from the Palo Alto airport.
A neighborhood of houseboats.
Lots of what Nimue refers to as "water chickens".
Almost getting doored near Mountain View High School at mile 99 (I was distracted looking at the giant construction project they've started).
Helping a small boy (maybe 4 years old) pick himself up after a scooter crash at the bottom of the bike bridge over 85. His mom was way up the bridge out of sight, as he had apparently careened out of control to the bottom.