The San Jacinto Valley is a valley located in south western Riverside County, in Southern California.The valley is located at the base of the San Jacinto Mountains in the east and Santa Rosa Hills to the south with the San Gorgonio Pass to the north. The elevation on average is 1500 feet, with the highest points in the foothills south of Hemet and the western slopes of the San Jacinto Mountains. It is home to two cities, Hemet and San Jacinto. The combined population of the valley is over 100,000 residents. The valley is also where the story and play "Ramona" was set, the story was written after author Helen Hunt Jackson visited the valley in the 1880s. The valley is also known for being an area of agriculture, which has given way to more urbanized development as time goes on.
The first native people settled in the San Jacinto Valley thousands of years ago. Later, the Serrano and Cahuilla people arrived. Their villages were located along and near streams and springs. They were hunters and gatherers and they subsisted primarily on small game and acorns. The Soboba Indian Reservation, just east of San Jacinto, is now the home to the descendants of some of these people. The first Spanish explorers entered the San Jacinto Valley in the early 1770s. In 1774, and again in 1775, Col. Juan Bautista de Anza led two expeditions up from Mexico, crossing the Colorado River at Yuma and continuing across the Borrego Desert and up Coyote Canyon. For a few years, the Valley was on the main overland route to California. In the early 19th century the area became a cattle ranch for the Spanish Mission San Luis Rey, which is located in the modern day city of Oceanside. The area was known as Rancho San Jacinto. When the missions were broken up by the Mexican government, the land was given to José Antonio Estudillo in 1842. This land grant eventually became the towns of San Jacinto and Hemet.