ɪnsˈaɪd mˈeɪsən vˈæli ðə ɹˈoʊd fˈɔːɹks, wɪð ɹˈaʊt tˈuːhˈʌndɹɪd ˈeɪt sˈɜːvɪŋ ðɪ ˈiːst sˈaɪd ʌvðə vˈæli ænd ɹˈaʊt θɹˈiːhˈʌndɹɪd θˈɜːɾi nˈaɪn sˈɜːvɪŋ ðə wˈɛst.
Inside Mason Valley the road forks, with route 208 serving the east side of the valley and route 339 serving the west.