State Route 91 is a major highway located in Southern California. It runs approximately 30 miles, connecting the cities of Riverside and Orange. The route is known for its role in facilitating regional traffic and providing access to various communities and attractions. The highway features multiple lanes in each direction and includes several interchanges with other major routes, such as Interstate 15 and Interstate 5. State Route 91 is also recognized for its scenic views, particularly as it passes through the Santa Ana Mountains and near the Cleveland National Forest.