Rancho Posolmi

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Rancho Posolmi was a 1,696-acre (6.86 km2) Mexican land grant in present day Santa Clara County, California given in 1844 by Governor Manuel Micheltorena to Lupe Yñigo.[1] The name refers to Posolmi village of the Ohlone. The grant encompassed present day Moffett Field in Sunnyvale.[2][3]


Lupe Yñigo (1781-1864), an Ohlone Indian, who was appointed an alcalde at Mission Santa Clara, was given a land grant in 1844, and retained over 800 acres (3 km2) until his death in 1864.[4]

Robert Walkinshaw was a native of Scotland, who came from Mexico in 1847 to take charge of the New Almaden Quicksilver Mine for Baron, Forbes and Company, a British trading firm.

With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored. As required by the Land Act of 1851, a claim for Rancho Posolmi was filed with the Public Land Commission in 1852, [5] and the grant was patented to Thomas Campbell, Robert Walkinshaw, and Lopez Yñigo in 1881.[6]

In 1931, 1,000 acres (4.0 km2) were purchased by Bay Area communities and sold to the military for $1, to be used for an air base, later named Moffett Field.


  1. ^ Ogden Hoffman, 1862, Reports of Land Cases Determined in the United States District Court for the Northern District of California, Numa Hubert, San Francisco
  2. ^ Diseño del Rancho Posolmi
  3. ^ Early Santa Clara Ranchos, Grants, Patents and Maps
  4. ^ Laurence H. Shoup, Randall T. Milliken, 1999, Inigo of Rancho Posolmi: The Life and Times of a Mission Indian, Malki-Ballena Press, Novato, California, ISBN 978-0-87919-142-9
  5. ^ United States. District Court (California : Northern District) Land Case 410 ND
  6. ^ Report of the Surveyor General 1844 - 1886

Coordinates: 37°25′12″N 122°03′00″W / 37.420°N 122.050°W / 37.420; -122.050