The National Institute of Mountaineering and Allied Sports (NIMAS) is an autonomous institute under the Indian Ministry of Defence, which provides specialized training in mountain rescue, mountaineering and adventure sports. The institute was founded by the Government of Arunachal Pradesh and is located in Dirang of the West Kameng district of Arunachal Pradesh. NIMAS is the first National Institute of India mandated to conduct adventure courses in the field of land, air and aqua.