The Zagros Mountains (, ), make up Iran's and Iraq's largest mountain range. They have a total length of 1 500 km. The north end is in northwestern Iran and they run near the border with Iraq and along the north coast of the Persian Gulf. The mountain range ends at the Straits of Hormuz. The highest points in the Zagros Mountains are Zard Kuh (4 548 m) and Mt. Dena (4 359 m). 