 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 <unk> and the <unk> Indian <unk> before making a few <unk> and descending en route to the city of Banning as the Banning Idyllwild <unk> Highway . The highway continues as San <unk> 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 . 
