The
Santa Clarita Valley is part of the upper watershed of
Santa Clara River in
Southern California. The valley was part of the
Rancho San Francisco Mexican
land grant. Located in
Los Angeles County, its main population center is the city of
Santa Clarita which includes the communities of
Canyon Country,
Newhall,
Saugus, and
Valencia. Adjacent unincorporated communities include
Castaic,
Stevenson Ranch, Sunset Pointe, Tesoro,
Val Verde, Westridge, and the new master
planned community of
Newhall Ranch.