When the Mexican government ended its support of the mission system in 1834, most mission lands went to Californios rather than Native Americans as intended. Some Native Americans formed raiding parties and took horses from nearby ranchos after the missions closed. Antonio María Peralta held large rodeos and owned herds of 8,000 cattle and 2,000 horses at the height of the rancho's prosperity. Native Americans likely built Peralta's 1840 adobe house and encircling adobe wall. Luís Peralta deeded the rancho to his sons in 1842, possibly because he suspected the incoming US government would threaten Mexican land grants.