The province of Lorestan is bounded on the north by the Markazi province and Hamedan, on the south by Khuzistan , on the east by Isfahan, and on the west by Kermanshah province and Ilam . Its area is 28,560 square kilometers.
According to 1995 divisions, Lorestan has 9 counties, 10 towns, 24 rural districts, and 82 villages. Its center is Khoram Abad.  

Khoram-Abad is located at 1200 Meters above the sea level in the Lorestan province and surrounded by the Zagros mountain chain

 

Falak-ol-Aflak Fortress

This historical monument dating back to the Sassanid era (226-651AD) stands atop a rocky hill in the city of Khorram-Abad. Some com-prenhensive repair work was done by the Atabag rulers some 700 years ago. Already in 1977, it was used as museum, exhibiting both archaeological and ethnological items, but due to the imposed Iran-Iraq war, it has been closed since 1987. The castle used to have 12 towers. It is 22860 meters in perimeter and its tallest wall is 22.5 meters high. In the past the whole castle enjoyed one single courtyard however in later stage a number of rooms were built in its center hence dividing it into two separate curtyards.

 

Lorestan's Climate

Lorestan has a diverse climate. In winters, while the northern parts are covered with snow, the southern regions have a temperate rainy weather. The western parts of the province such as Sefid Kuh have more precipitation than the eastern parts, ie. Dorud and Aligudarz. Likewise, the provincial towns have varying climates: Khoram Abad has moderate winters and warm summers, while Borujerd has cold winters and moderate summers. Aligudarz has icy winters and moderate summers.
Based on climatic conditions, Lorestan can be divided into three separate areas:
1. The cold mountainous area with heavy snow. The freezing period of the region lasts for 70 days.
2. The central temperate area which is located in the central parts of mountainous regions in the north and north-east and the flat areas in the south. Precipitation in winter is often in the form of rain.
3. The southern hot area which has the lowest height. As the area is located in lower regions and is en route the southern warm winds, it has hot summers.
The average annual rainfall is between 400 and 450 millimeters.