Kabir Kouh Tunnel is an ongoing road tunnel project in Ilam province, Iran. The tunnel passes under the Kabir Kouh range connecting the counties of Darreh Shahr and Abdanan, shortening the current 40-kilometre (25 mi) mountain pass to about 6 km. Kabir Kouh is a 170-kilometre (110 mi) long mountain range in Ilam Province extending along a southeast–northwest axis from an area near Pa Alam, Lorestan province to the vicinity of Chenar Bashi about 20 km (12 mi) south of Ilam. The range acts as a barrier between the province's western areas such as Abdanan and border cities of Mehran and Dehloran with the country's internal road networks.
