'); } -->
Graton tribal Chairman Greg Sarris talks with the tribal council before an event at the Graton Resort & Casino in Rohnert Park. On Tuesday, the 1,300-member Sonoma County tribe will open its gambling palace, the closest tribal casino to San Francisco. The $800 million development is expected to instantly rival the Thunder Valley Casino Resort, in Lincoln, for supremacy in the California gambling market. The Graton tribe, the beneficiary in the development, comprises many descendants of Coast Miwok and Southern Pomo Indians who in 1922 were herded onto 15.4 acres of steep terrain in remote Sonoma County that the federal government designated as the Graton Rancheria.