Highway 18 is a state highway located in the United States, primarily running through the state of California. It stretches approximately 50 miles, connecting the cities of San Bernardino and Lake Arrowhead. The highway is known for its scenic views, winding roads, and access to various recreational areas, including the San Bernardino National Forest. The route serves as a vital link for residents and tourists, providing access to outdoor activities such as hiking, camping, and skiing. Highway 18 is also a popular choice for those traveling to the Big Bear Lake area, making it an important thoroughfare in the region.