The most important reservations include: the Agua Caliente Reservation in Palm Springs, which occupies alternate sections (approx. 640 acres each) with former railroad grant lands that form much of the city; the Morongo Reservation in the San Gorgonio Pass area; and the Pala Reservation which includes San Antonio de Pala Asistencia (Pala Mission) of the Mission San Luis Rey de Francia in Pala. These and the tribal governments of fifteen other reservations operate casinos today. The total acreage of the Mission group of reservations constitutes approximately .