Bojnurd in the context of North Khorasan province

The Aladagh Mountains or the Aladagh Range refers to a mountain range situated in the southeastern section of Iran's North Khorasan province, southeast of the Caspian Sea. The range is located 25 kilometres south of Bojnurd, the capital city of North Khorasan. The Aladagh Mountains merge with the Alborz Mountains in the west and then run southeastwards in a northwest-southeast direction. The highest peak of the range is Mount Shahjahan with an elevation of 3,032 metres (9,948 ft). This peak is located about 35 kilometres (22 mi) east of Esfarayen, almost in southeastern part of North Khorasan Province.

With an elevation of 3,032 metres, Mount Shahjahan (Kuh-e Shahjahan) is the highest point in the Aladagh Mountains and North Khorasan Province in the northeastern Iran. This peak is located in the southeastern part of the Aladagh Range. The cities of Faruj and Shirvan are situated in the northeast and the north, respectively, the city of Esfarayen lies to the west, and Bojnurd, the capital of North Khorasan, is to the northwest. Mainly formed in the Miocene and the Pliocene, Mount Shahjahan is made chiefly of Jurassic rocks.