Spanish & Mexican periods thumb|left|Famed Spanish explorer Juan Bautista de Anza, whose expedition came through the area in 1774. Spanish scouts initially came across descendants of the Shoshone, and Luiseño tribes; although other groups, such as the Serrano and Cahuilla were in the area. The late prehistoric Luiseño and Cahuilla were semi-sedentary, meaning that they wintered in villages, then spread out in family groups during the spring and summer months to harvest seeds and acorns.
spanish & mexican periods thumb|left|famed spanish explorer juan bautista de anza whose expedition came through the area in 1774 spanish scouts initially came across descendants of the shoshone and luiseño tribes; although other groups such as the serrano and cahuilla were in the area the late prehistoric luiseño and cahuilla were semi-sedentary meaning that they wintered in villages then spread out in family groups during the spring and summer months to harvest seeds and acorns