20200611 19565800 1.0 TRUE Trails Trails and water routes used by indigenous people in California prior to and during the period of colonization, as recorded by ethnographers in the 19th and 20th centuries. Source: James T. Davis, "Trade Routes and Economic Exchange Among the Indians of California.” University of California Archeological Survey No. 54, 1961. University of California, Berkeley Library (JTD1961). See nahc.ca.gov/cp/references/