The historical town center of Ramona is located in the Santa Maria Valley. This valley was the Rancho Santa Maria, a Mexican land grant. The San Vicente Valley was formerly part of the Rancho Cañada de San Vicente y Mesa del Padre Barona Mexican land grant. The San Diego Country Estates subdivision in Ramona is located in the San Vicente Valley. The Barona Indian Reservation, not part of the RCPA, is also within part of the Rancho Cañada de San Vicente y Mesa del Padre Barona Mexican land grant.