Lashkargāh, historically called Bost or Boost, is a city in southwestern Afghanistan and the capital of Helmand Province. It is located in Lashkargah District, where the Arghandab River merges into the Helmand River. The city has a population of 201,546 as of 2006. Lashkargah is linked by major roads with Kandahar to the east, Zaranj on the border with Iran to the west, and Farah and Herat to the north-west. It is mostly very arid and desolate. However, farming does exist around the Helmand and Arghandab rivers. Bost Airport is located on the east bank of the Helmand River, five miles north of the junction of the Helmand and Arghandab rivers.