It must be. When I was reading the SF Chronicle online there was an ad for the Gravenstein Apple Festival. Here's the festival website for details.
Here's my obsessive posts from last year where I tried almost every gravenstein apple in the Sebastopol area and lots of products made with the apples such as cider, pie, etc
Apple-looza: Gravenstein Apple Adventure results
Apple Madness: 2009
Here's a list I put together
Gravenstein Apple Adventures Around Sebastopol
So, what is happening this year? How are the apples? I want my virtual taste.