Lorestān Province

Lorestān (Persian and Luri لرستان; also Luristan) comprises a province and a historic territory of western Iran amidst the Zagros Mountains.The population of Lorestān is calculated 1,739,644 people in 2006 .
Lorestān covers an area of 28,392 km². The major cities in this province are: Borujerd, Khorramabad,Aligoodarz, Dorood, Koohdasht, Azna, Alashtar, Noor Abad, and Pol-e-Dokhtar.

Geography and climate
The name Lorestān means "land of the Lurs", and in the wider sense consists of that part of western Iran bounded by ilam and extending for about 400 miles on a northwest to southeast axis from Kermanshah to Fars, with a breadth of 100 to 140 miles. The terrain consists chiefly of mountains, with numerous ranges, part of the Zagros chain, running northwest to southeast. The central range has many summits which almost reach the line of perpetual snow, rising to 13,000 feet and more, and it feeds the headwaters of Iran's most important rivers, such as the Zayandeh rud, Jarahi, Karun, Dix, Abi, Karkheh. Between the higher ranges lie many fertile plains and low hilly, well-watered districts.
The highest point of the province is Oshtoran Kooh peak at 4,050 m. The low-lying areas being in the southern most sector of the province, are approximately 500 m above sea level.
The climate is generally sub-humid continental with winter precipitation, a lot of which falls as snow (Köppen Csa). Because it lies on the westernmost slopes of the Zagros Mountains, annual precipitation in Lorestān is among the highest anywhere in Iran south of the Alborz Mountains. At Khorramabad, the average annual precipitation totals 530 millimetres (21 inches) of rainfall equivalent, whilst up to 1270 millimetres (50 inches) may fall on the highest mountains. The months June to September are usually absolutely dry, but Khorramabad can expect 4 inches of rainfall equivalent in December and January.
Temperatures vary widely with the seasons and between day and night. At Khorramabad, summer temperatures typically range from a minimum of 12°C (54°F) to a hot maximum of 32°C (90°F). In winter, they range from a minimum of -2°C (28°F) to a chilly maximum of 8°C (46°F).

History
Lorestān is one of the oldest regions of Iran. In the third and fourth millennium B.C., migrant tribes settled down in the mountainous area of the Zagros Mountains. The Kassites, an ancient people who spoke neither an Indo-European nor a Semitic language, originated in Lorestān.
Lorestān was invaded and settled by the Iranian Medes in the second millennium B.C. The Medes absorbed the indigenous inhabitants of the region, primarily the Elamites and Kassites, by the time the area was conquered by the Persians in the first millennium B.C.
Lorestān was successfully integrated into the Achamenid, Parthian and Sassanian empires. Parts of Lorestān managed to stay independent during the Arab, Seljuk and Mongol invasions.
According to the Encyclopaedia of Islam, the Lurs, previously open adherents of the Ahl-e-Haqq faith, revere bread and fire like the Zoroastrians. "Being split up into numerous tribes and sections, they migrate to their summer pastures as separate bands without overall command. In 1936, Reza Shah's army conquered them, with much bloodshed and starvation, forcing many of the survivors to settle in villages under landlords.".
Lors were amongst the original Qizilbash that aided in the founding and administration of the Safavid dynasty.