The Irtysh River is one of the major rivers in Central Asia, flowing through countries like China, Kazakhstan, and Russia. It is approximately 4,248 kilometers long, making it the longest tributary of the Ob River. The river originates in the Altai Mountains of China and travels northward, eventually joining the Ob River in western Siberia. The Irtysh River plays a crucial role in the region's ecology and economy. It provides water for irrigation, supports local fisheries, and serves as a transportation route. Several cities, including Omsk in Russia, are situated along its banks, benefiting from its resources and trade opportunities.