Subway Restaurants Address344 S Twin Oaks Valley Road, San Diego County, San Marcos, US Phone+1 760-510-6416 Websitehttps://restaurants.subway.com/united-states/ca/san-marcos/344-s-twin-oaks-valley-rd AreaSan Diego County, San Marcos, United States Open on map Directions Back to directory search ☆ ☆ ☆ ☆ ☆ Submit