Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. State Route 18 (SR 18) in the U.S. state of California runs from State Route 210 in San Bernardino to State Route 138 near Adelanto. It is the primary route into the San Bernardino Mountains and has two discontinunities: one in Big Bear Lake, the other in Victorville.SR 18 is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System. However, it has not been designated as a scenic highway by Caltrans.The constructed portion of Route 18 begins at State Route 210 and quickly enters the San Bernardino Mountains as a four-lane expressway. SR 18 is known as Waterman Avenue in the city of San Bernardino before turning into SR 18. The route climbs north at a gentle grade until it turns east, where it begins to offer panoramic views of San Bernardino.