The Kopet Dag is a mountain range on the frontier between Turkmenistan and Iran, extending about 650 km (404 mi) along the border, east of the Caspian Sea. The highest peak of the range in Turkmenistan is southwest of the capital Ashgabat and stands at 2,940 m (9,646 ft). The highest Iranian summit is 3,191 m (10,466 ft).

The foothills of the Kopet-Dag near Ashgabat are the site of the remains of the ancient Parthian city of Nisa (Nessa).

Mountain ranges of Asia | Mountains of Iran | Mountains of Turkmenistan

Köpetdag | Kopet Dag