A few comments... The driving time between St. Helena and John Ash is 30-45 minutes, depending on how comfortable one is when driving on hilly roads. There are no hilly roads between St. Helena and the town of Sonoma, but the driving time is at best 40-45 minutes -- in most cases longer than it is to John Ash! And FYI, Mirepoix is about a 5-minute drive north from John Ash. However, after saying the above, I cannot stress strongly enough that the roads between St. Helena and John Ash are hilly. You would be driving them at night, and likely after having consumed some wine. Keep this in mind if you select a restaurant in the Santa Rosa/Healdsburg corridor. I suppose the biggest question is, where are you planning to go when you're in Sonoma County? As others have mentioned, the county is very large, and if you're planning to go to wine areas such as Russian River Valley or Dry Creek Valley, the driving time between those areas and Sonoma Valley (where the town of Sonoma is located) can be well over an hour. I would suggest that you plan your day in Sonoma County first, and then where you wind up at the end of the day is where you have dinner. For example, you DO NOT want to end your day at Ferrari-Carano winery and then drive to Girl and the Fig for dinner! And FWIW, from my own experience, Mirepoix is on another level compared to the places I've dined at in Sonoma Valley (which include Girl and the Fig and General's Daughter). Mark