Here is the best (prettiest, lowest traffic, fewest stoplights, most trees & shade) bicycling route I know from Southern Sunnyvale to Adobe Systems headquarters at 345 Park Avenue in downtown San Jose and back again:
Sunnyvale to San Jose Bike Route using Google Maps
San Jose to Sunnyvale Bike Route using Google Maps
Sunnyvale to San Jose using Bikely (click on title of map below for bigger version):
It's about 11 miles and passes many parks and schools. Credit to Roberto Perelman for showing me the bulk of this most excellent biking route. I've been using it periodically since 2001 or so and Roberto rides it daily.