The Altai mountain system is a mountain range located in Central Asia, stretching from Mongolia to Kazakhstan, Russia, and China. It is one of the largest mountain systems in the world, with an area of over 90, 000 square miles. The highest peak is Belukha Mountain, which stands at 4, 506 meters above sea level. The Altai mountain system is home to many species of plants and animals, including the snow leopard, argali sheep, and Siberian ibex.