Rancho Huasna was a 22,153-acre (89.65 km 2) Mexican land grant in present day San Luis Obispo County, California given in 1843 by Governor Manuel Micheltorena to Isaac J. Sparks. [1] . The grant extended along the Huasna River and the western slope of the Santa Lucia Range, east of present day Arroyo Grande and encompassing Huasna. [2][3][4] More @Wikipedia
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