The Mongolian border refers to the international boundary that separates Mongolia from its neighboring countries, primarily China to the south and Russia to the north. This border stretches approximately 4,677 kilometers, making it one of the longest land borders in the world. It plays a crucial role in trade and cultural exchange between these nations. The border is characterized by diverse landscapes, including mountains, deserts, and steppes. Several key border crossings facilitate movement for goods and people, such as the Zamyn-Üüd crossing into China. The region is also significant for its historical trade routes, including parts of the ancient Silk Road.