Frantoio Ristorante 152 Shoreline Hwy, Mill Valley, CA94941 Frantoio Ristorante serves up Italian fare in a casually elegant atmosphere. They feature a large main room that seats…More up to 150. There is a smaller private room which seats up to 50. The centerpiece of the restaurant is the olive oil production facility that makes certified organic oils. Throughout November and December, guests will be able to see the olive press in action. Frantoio Ristorante is located in the Tam Junction area of Mill Valley. It is near the Highway 101 on and off-ramps.