The only outlet for the whole Zanskar hydrographic system is thus the Zanskar river, which cuts the deep and narrow Zanskar Gorge through the Zanskar range. The Zanskar range spans from the Karcha (Suru) River to the upper Karnali River. Kamet Peak is the highest point in the range. These topographical features explain why access to Zanskar is difficult from all sides. Communication with the neighbouring Himalayan areas is maintained across mountain passes or along the Zanskar river when frozen. The easiest approach leads from Kargil through the Suru valley and over the Penzi-La. It is along this track that in 1979 the only road in Zanskar was built to connect Padum with the main road from Srinagar into Ladakh. One of the first Tibetologists to spend an extended period in the region was Hungarian scholar Sándor Csoma de Kőrös who spent over a year living in the region in 1823. After being integrated into the newly formed state of India in 1947, Zanskar and the neighbouring region of Ladakh were both declared restricted areas and only opened to foreigners in 1974. Climate Condition Zanskar is a high altitude semi-desert lying on the northern flank of the Himalayan Range. This mountain range acts as a barrier protecting Ladakh and Zanskar from most of the monsoon, resulting in a pleasantly warm and dry climate in the summer. Rain and snowfall during this period are scarce, although recent decades have shown a trend towards increasing precipitation. Several water-driven mills were built during ancient periods of drought at a great distance from the villages, but have been abandoned because running water is now available nearer to the settlements. Zanskari houses, though otherwise well built, are not adapted to the recently increasing rainfall, as their roofs leak, catching their surprised inhabitants unprepared. Most of the precipitation occurs as snowfall during the harsh and extremely long winter period. These winter snowfalls are of vital importance, since they feed the glaciers which melt in the summer and provide most of the irrigation water. Parts of Zanskar valley are considered some of the coldest continually inhabited places in the world. Demography Zanskar's population is small, the April 2006 medical census records a population of 13,849 people. The medical census is the most accurate indicator of population as it collects birth, death, and census information from Zangskar's 22 medical aid centers. Roughly 95% of the inhabitants practice Tibetan