Sangsar is situated on the southern slopes of the Alborz mountains, a small distance from the city of Semnan. In the northern part it has a common boundary with Mazandaran Province. Hear, the chain of Alborz mountains is very close to the Kaveer(desert). Image File history File links Sangesar(A_H)1. ... Image File history File links Sangesar(A_H)1. ... -1... Mazandaran (Persian: مازندران) is a province in northern Iran, bordering the Caspian Sea in the north. ... Alborz Mountains underneath clouds seen from Tehran Alborz (in Persian البرز), also written as Alburz or Elburz, is a mountain range in northern Iran, stretching from the borders of Armenia in the north-west to the southern end of the Caspian Sea, where also Tehran and Irans highest peak, Damavand...

Sangesar, specially the northern part of it, is completely mountainous with cold winters, heavy snowfalls but with mild summers.

The area of the district is about 1100 square kilometers. The distance between Sangesar city and Semnan city is 20 kilometers, the alititude is about 1630 meters above sea level.

The most important network of roads consists of Semnan to Sangesar to Shahmirzad to Fooladmahale axis which connects these places with the city of Sari. This road connects the two provinces of Mazandaran and Semnan.