The Canadian border is the longest international land border in the world, stretching over 8,891 kilometers (5,525 miles) between Canada and the United States. It runs from the Atlantic Ocean in the east to the Pacific Ocean in the west, passing through various landscapes, including mountains, forests, and lakes. The border is marked by a series of monuments and is monitored by both the Canada Border Services Agency and the U.S. Customs and Border Protection. There are several official crossing points where travelers can enter or exit, and regulations are in place to manage the flow of goods and people between the two countries.