I might be trying to justify something that's not quite "out-the-door" bicycle trips, but how about the north side of San Francisco Bay area. Do the Mt. Diablo climb, take a ride through one of the wine country valleys (Sonoma or Napa), maybe climb Mt. Tamalpias (sp?), or simply ride a commuter bike around San Francisco on the weekend (weekday traffic is he!! in the City!) with a simple 3-mile ride across the Golden Gate bridge. You could stay in the north Oakland/Berkeley area (DO NOT stay in south Oakland!) and do most of these with the aid of the ferries and BART transit lines.