Join Date: Jun 2011
Bikes: Leader 725, Centurion Turbo, Scwhinn Tempo, Schwinn Premis, GT Tequesta, Bridgestone CB-2,72' Centurion Lemans
I'm more of a pub crawler kinda guy so that one I can't help very much on, but most of these rental companies have some pretty awesome tour setups, I'd suggest looking at that wine country bike place since that's a major part of their business model. I'll try to remember to ask a wine drinking friend of mine if he's partial to any.
As for riding, I'd suggest checking out Spring Lake Park/Annadel state Park, they're in Santa Rosa and in reality they are connected, there's some decent dirt there and a very large set of asphalt infrastructure to slowpoke around on if you feel like it.
There's also a park or two in my specific neck of the woods as well. Foothills Park in Windsor can be fun, lots of dirt trails all over. If you want something extremely tame, also in Windsor there is Riverfront Park extremely wide dirt paths yada blah, there is singletrack there but even the fishermen don't like walking those paths...
There's more but that's just off the top of my head, here's a decent listing of trails it looks like.
Sonoma County Mountain Biking - Mountain Bike Trails
Let me know if there's anything else you want a heads up on.