For variety, on Saturday I joined some people I know who were going on one of the AIDS LifeCycle training rides in the South Bay– a 46-mile loop, taking us from Mountain View (near the Caltrain station) through Cupertino, Saratoga, Los Gatos, and some towns I’d never heard of (Monte Sereno).
It was a good workout and way to spend a chunk of the day, with one significant hill and a lot of fairly straight rolling-hill sections where you could get momentum going (while nominally a 10-12mph pace, the pack I was riding with made some solid 20-25mph pulls on the long flat stretches and the road flew by). However, the scenery was nothing special– lots of suburbs, strip malls, cars, and Starbucks. Given that and how slow Caltrain is, I’ll probably stick with mostly SF/Marin/East Bay rides in the future, or try some of the more woodsy (and hilly) peninsula rides.