The range extends for approximately 30 mi (50 km) from the San Bernardino Mountains southeast to the
The … See more

The range is a fault block of granitic rocks squeezed between the San Jacinto fault on the west and the San Andreas fault system on the east. The fault scarp on the northern and eastern side is one of the most abrupt in North A… See more

The San Jacinto Mountains, like the neighboring San Bernardino Mountains, are a humid island above the surrounding desert and semi-desert. Annual precipitation ranges from about 15 inches at the west… See more

The range can be thought of as a sky island, as it contains numerous species of flora and fauna that cannot tolerate the triple-digit-Fahrenheit heat of the surrounding valleys. Vegetation found on the mountain flanks is str… See more

The communities of Idyllwild-Pine Cove, Mountain Center, and Pinyon Pines are located in the San Jacinto Mountains.
The indigenous Cahuilla live in the deserts around the San Jacinto Mountains and used the ra… See more