Rancho Monserate was a 13,323-acre (53.92 km2) Mexican land grant in present-day San Diego County, California given in 1846 by Governor Pío Pico to Ysidro María Alvarado.[1] The grant extended south and east of the present day Fallbrook down to the San Luis Rey River. The grant was bounded on the west by Pico's Rancho Santa Margarita y Las Flores.[2]
- ^ Ogden Hoffman, 1862, Reports of Land Cases Determined in the United States District Court for the Northern District of California, Numa Hubert, San Francisco
- ^ Diseño del Rancho Monserate. 1840s.