State Route 79 (SR 79) is a state highway in the U.S. state of California. The route begins at Interstate 8 (I-8) in San Diego County, continuing north through the town of Cuyamaca into Julian. After passing through Warner Springs, the route crosses into Riverside County, serving the cities of Temecula and Murrieta. SR 79 ends at I-10 in Beaumont. Route description SR 79 begins at I-8, about east of San Diego. The road runs along Old Highway 80 in the town of Descanso, until splitting to the north at a T intersection. The route then traverses Cuyamaca and Cuyamaca Rancho State Park on its way north. This portion of the route is very serpentine, with hairpin turns, as it follows the contours of the land by moving laterally, rather than up-and-down or via cuts. It then overlaps SR 78 between Santa Ysabel and Julian, a distance of about . At Julian, both routes join at a T intersection just south of town, thus requiring a turn to stay on SR 79, and turn at an intersection in the northern portion of downtown. At Santa Ysabel, SR 79 comes to a T intersection with SR 78 running east–west. SR 79 continues northwest, meeting the eastern terminus of SR 76 near Lake Henshaw at the settlement of Morettis and passing through Warner Springs before crossing into Riverside County. SR 79 then meets the western terminus of SR 371 before going through Aguanga. It then passes Vail Lake and parallels Temecula Creek as it approaches the Temecula city limits, where it becomes a city-maintained road}. It overlaps I-15 for about three miles through Temecula. The ramps connecting SR 79 to I-15 are the first and third ramps northbound (second and fourth southbound) of those located between the Riverside/San Diego county line and the I-15/I-215 junction. In both cases, to enter SR 79 from I-15, one must head slightly east (although SR 79 is signed as a north–south highway). The southern exit from I-15 is known as Temecula Parkway. SR 79 exits from I-15 in the northern area of Temecula as Winchester Road. It then runs along the eastern city limits of Murrieta before passing by the reservoir at Diamond Valley Lake. SR 79 continues through the community of Winchester and turns east on Florida Avenue west of Hemet. The section between those concurrent with SR 74 and Interstate 15 (in Temecula, Murrieta,