Rancho Boca de Santa Mónica

Rancho Boca de Santa Mónica was a 6,656-acre (26.94 km2) Mexican land grant in present-day Los Angeles County, California given by governor Juan Alvarado in 1839 to Ysidro Reyes and Francisco Marquez.

[3] Francisco Marquez and his wife, Roque Valenzuela, built an adobe house in the upper mesa of the canyon.

[4] 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.

Ysidro Reyes died in 1861, leaving his undivided one-half interest in the rancho to his widow Maria Antonia.

In 1874, Baker filed suit to partition the land among himself and the heirs of Francisco Marquez, who jointly held the other one-half interest.