El Camino Real (The Royal Road) is a historic road linking the 21 Spanish missions of California. Stretching over 600 miles (1000 km) from San Diego in the south to Sonoma in the north, the route traverses much of the state and has been a popular traveler itinerary for California motorists for nearly a century. Due to the distance it needs more than a day to tour everything. Hope this answers the question.
