Of course we know from our Petaluma and Lake Sonoma rides that riding the hills and vineyards of Sonoma is hard to beat. And anyone who has ridden King's Ride/Meyer's Grade can attest that it is likely the most beautiful (if not the toughest) ride in California and perhaps the entire country.
Here's a story from the Press Democrat about the rise of cycling in Sonoma:
How Sonoma County became hotbed of the cycling world
...How Santa Rosa and Sonoma County rose to such prominence might seem to the uninitiated as a meteorite arriving out of nowhere, and there's some validity to that as the sport does not have the national cachet of football, basketball or baseball. Even so, the hills and forests and ocean vistas and sweeping panoramas weren't discovered in the last year or two. Nor have bicycles arrived at about the same time as Twitter. For that matter, the urge to compete is hardly a recent phenomenon...
Oddly enough, the subtitle of the article says "With no dramatic event or charismatic hero, Santa Rosa has become sport's epicenter" and then it goes on to detail the Tour of California, a staple in Sonoma, and Levi Leipheimer move's to Santa Rosa. No offense meant, I suppose.
Despite that, the article makes for interesting reading. Always good to see cycling covered in the media in a positive way.