California State Route 243

State Route 243
Banning-Idyllwild Panoramic Highway
SR 243 highlighted in red
Route information
Defined by
Maintained by Caltrans
Length:	29.625 mi (47.677 km)
Major junctions
South end:	SR 74 near Mountain Center
North end:	I-10 in Banning
Location
Counties:	Riverside
Highway system
State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic ← SR 242 SR 244 →

State Route 243 (SR 243), or the Banning-Idyllwild Panoramic Highway, is a 30-mile (50 kilometer) two-lane highway that runs from Banning, California (in the north) to Idyllwild, California (in the south) in Riverside County, California. The highway is a connector between Interstate 10 (I-10) and SR 74. Along its route, it provides access to the San Bernardino National Forest. A road from Banning to Idyllwild was planned around the turn of the twentieth century, and was open by 1910. The road was added to the state highway system in 1970.

SR 243 begins at SR 74 in the San Jacinto Wilderness near Mountain Center, Riverside County as Idyllwild Road. The highway traverses north along a winding road through the community of Idyllwild. SR 243 makes a left turn at the intersection with Circle Drive and continues through Pine Cove. The road continues through the forest past Mount San Jacinto State Park through Twin Pines and the Morongo Indian Reservation before making a few switchbacks and descending en route to the city of Banning as the Banning Idyllwild Panoramic Highway. The highway continues as San Gorgonio Avenue into the city before making a left onto Lincoln Street and a right onto 8th Street and terminating at a diamond interchange with I-10.