Rancho San Miguel was a Mexican land grant in present-day Sonoma County, California given in 1840 by Governor Juan B. Alvarado to William Marcus West.Ogden Hoffman, 1862, Reports of Land Cases Determined in the United States District Court for the Northern District of California, Numa Hubert, San Francisco The grant was located north of present-day Santa Rosa, between Mark West Creek and Santa Rosa Creek, and encompassed present-day Mark West and Mark West Springs. Diseño del Rancho San MiguelMexican Land Grants in Sonoma County
History William Mark West (d.1849), a Scot, came to Sonoma in 1832, soon after marrying Guadalupe Vasquez, a niece of General Vallejo in Santa Cruz, Mexico. Mark West built an adobe and established a trading post and post office near the stream which now bears his name.
Mark West died in 1849, leaving his land to his wife and seven children (Maria Luisa Del Carmet, Mark, Juan, William, Charles, Adelaide, and Chata). General Vallejo administered the estate. A claim for Rancho San Miguel was filed with the Public Land Commission in 1852.United States. District Court (California : Northern District) Land Case 326 NDFinding Aid to the Documents Pertaining to the Adjudication of Private Land Claims in California, circa 1852-1892 The claim for six square leagues was rejected by the Land Commission in 1855, but confirmed by the US District Court in 1857. The US Attorney General filed an appeal with the case to the US Supreme Court. The Supreme Court accepted one and a half square leagues, United States v. West's Heirs, U.S. Supreme Court, 63 U.S. 22 How. 315 315 (1859) and the grant was patented to Guadalupe Vasquez de West in 1865. Report of the Surveyor General 1844 - 1886
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