State Route 56 is a state highway located in California, primarily serving the city of San Diego. It runs approximately 6 miles, connecting Interstate 5 to Interstate 15, facilitating travel across the region. The route is known for its scenic views and accessibility to various neighborhoods, including Carmel Valley and Rancho Peñasquitos. It features several interchanges and is an important corridor for commuters and local traffic, enhancing connectivity within San Diego County.