Rancho Del Sol was largely used for agricultural use prior to suburbanization, as it was largely made up of tomato and strawberry farms, as well as plant nurseries. It was also home to an informal migrant farm camp that was locally known as "Rancho Diablo", where the 800 residents of the settlement worked in the farms and lived off of the land to survive, who later moved east to Torrey Highlands after becoming displaced to make way for the Pacific Highlands Ranch development.