The Iipay Nation of Santa Ysabel is a federal reservation, located in northeastern San Diego County, California. The reservation was founded in 1893 and is 15,526.78 acres large with over 800 enrolled members. The Santa Ysabel Indian Reservation ranges from 3,200 feet to 5,700 feet in elevation and it comprises a land base of over 15,000 acres on three tracts of land.