San Bernardino County is the largest county in all of the United States. It is located in California and consists of the cities: Highland, Ontario, Apple Valley, Bloomington, Pioneertown, and a lot more! It has a population of 2.18 million people, and the area has 20,105 square miles. San Bernardino has a popular road in it called Route 66. It is so popular that California has a yearly festival in honor of the road as well as a museum. People also like the county because of the skiing, resorts, sightings, other museums, zoos, mountains and more! Exciting destinations in San Bernardino consist of Big Bear Lake, Death Valley National Park, Joshua Tree National Park, and plenty more!