Francisco M. Estrada received the land grant in 1842. Estrada's wife Inez Castro Estrada died in 1844 and Estrada died in 1845. His father, Jose Mariano Estrada, inherited the land and transferred it to Inez Castro Estrada's father, Mariano Castro (1784–1857). He was born in San Francisco and served in the Spanish army. He was made
Alcalde of the San Jose Pueblo. In 1849, Mariano Castro sold half the rancho to
Martin Murphy, Jr., (1807–1884), the son of Martin Murphy Sr., who brought his family to California with the
Stephens-Townsend-Murphy Party in 1844. 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 Pastoría de las Borregas was filed by Mariano Castro with the
Public Land Commission in 1852, and the grant was
patented for in 1881. A claim was filed by Murphy, Jr. with the Land Commission in 1852, and the grant was patented for in 1865. Murphy, Jr. died in 1884, and his wife, Mary Bolger Murphy, died in 1892. Their rancho was divided among their children; each received . ==Historic sites of the Rancho==