The Yurok are Native Americans whose ancestors, by some estimates, have lived for at least 3,000 years near the Pacific Ocean coast of Northern California and Southern Oregon, United States. Following encounters with white settlers into their aboriginal lands during a gold rush in 1850, the Yurok were faced with disease and massacres that reduced their population by 75%. In 1855, most of those that remained were forcibly relocated to a reservation on the Klamath River. On November 24, 1993, the Yurok wrote a constitution that details the jurisdiction and territory of their lands. The Yurok are currently the largest group of Native Americans in the state of California. The Yurok reservation of 63,035 acres (255 km²) has an 80% poverty rate and 70% of the inhabitants do not have telephone service or electricity, according to the tribe's webpage.----------Estimates for the pre-contact populations of most native groups in California have varied substantially. Alfred L. Kroeber (in 1925) put the 1770 population of the Yurok at 2,500. Sherburne F. Cook initially agreed (Cook in 1976), but later raised this estimate to 3,100.------------------------- By 1870, the Yurok population had declined to 1,350, according to Cook (in 1976). By 1910 it was reported as 668 or 700 (Cook in 1976; Kroeber in 1925).