Fun fact (well, for me anyway). Sonoma is the only NASCAR race I have ever been to, the 2002 race there. Back then, the track was still referred to as Sears Point Raceway. During the race weekend they unveiled the new name Infinion Raceway. We went to the track Thursday and Friday under the Sears Point banner to watch practice and then Saturday morning everything was Infinion and we were like "WTF mate?!"
At the time I lived in a small Suburb called Brisbane (down at the bottom of the map below San Francisco where San Bruno Mountain is. I live in New Mexico now but my mom and little bro live in Vallejo along the coast to the south east of Sonoma.