Sonoma County's Russian River Valley is very well known for Pinot Noir along with the "old guard" Carneros region and the "up-and-coming" Sonoma Coast growing area. Russian River Valley is the place to concentrate your visit as there is a lot more Pinot available compared to the other regions in the county.
|image from rrvw.org|
Following are some of the respected Pinot Noir producers. All are open to the public and and should offer you a variety of Pinot Noirs to sample. You may not have heard of all of these (or any) as they are all smaller operations.
Arista - Japanese-inspired gardens and lots of different Pinots.
Dutton-Goldfield - Well-made Pinots (plus Chardonnay and Syrah).
Joseph Swan - One of the old guard producers and still highly respected. Tasting room open weekends only.
Marimar - The winery is located in the Green Valley sub-appellation of Russian River Valley, but has a tasting room in the town of Sebastopol. They are all about Chardonnay and Pinot Noir.
Merry Edwards - One of the top Pinot Noir winemakers IMO.
Moshin - Lots of different Pinots available.
A few others to try if you don't mind making an appointment are Benovia, Gary Farrell, Inman, Lynmar, and Siduri.