Siachen glacier, located in the eastern Karakoram Range in the Himalayas, is one of the five largest glaciers in the Karakoram, situated at an average altitude of 18,000 ft above sea level. At 78 km long, it is the longest glacier in the Karakoram and second longest in the world's non-polar areas.
Both India and Pakistan claim sovereignty over the entire Siachen region. Both countries maintain a permanent military presence in the region at a height of over 6,000 m. The world's highest military base belongs to India and is at a height of approximately 6,000 m on the Siachen Glacier in the state of Kashmir. Troops are regularly deployed to 6,700 m on the glacier during the on-going conflict with Pakistan over the state of Kashmir.
Siachen Glacier also boasts of the world's highest helipad built by India at Point Sonam, 21,000 ft above the sea level, to supply its troops.
Aside from the military presences, the glacier region is unpopulated. The nearest civilian settlement is the village of Warshi, 10 miles downstream from the Indian base camp. The region is also highly remote with limited road connectivity. The helicopters are one of the most efficient transportations.
According to Internet