Between 1843 and 1846, when California was a province of independent Mexico, five Mexican land grants totaling were granted in Stanislaus County. Rancho Orestimba y Las Garzas, Rancho Pescadero and Rancho Del Puerto were located on the west side of the San Joaquin River, and Rancho Del Rio Estanislao and Rancho Thompson on the north side of the Stanislaus River. Additionally, in 1844 Salomon Pico received a Mexican land grant of in the San Joaquin Valley, somewhere near the Stanislaus River and the San Joaquin River in what is now Stanislaus County. However, the grant was never confirmed by the Land Commission.