Khardung La () or Khardung Pass is a mountain pass in the Leh district of the Indian union territory of Ladakh. The pass is on the Ladakh Range, north of Leh, and connects the Indus river valley and the Shyok river valley. It also forms the gateway to the Nubra valley, beyond which lies the Siachen Glacier. A motorable road through the pass was built in 1976, and opened to public motor vehicles in 1988. Maintained by the Border Roads Organisation, the pass is strategically important to India as it is used to carry supplies to the Siachen Glacier. The road is one of the world's highest motoroable roads. The elevation of Khardung La is . Local summit signs and dozens of stores selling shirts in Leh incorrectly claim its elevation to be in the vicinity of and that it is the world's highest motorable pass. History Khardong La is historically important as it lies on the major caravan route from Leh to Kashgar in Central Asia. About 10,000 horses and camels used to take the route annually, and a small population of Bactrian camels can still be seen at Hunder, in the area north of the pass. In the early 1950s, William O. Douglas described "the trail, after crossing the Indus, divides, one fork going south along the river's edge to Spitok, Khalatse and Khargil, the other turning north to Leh, the Khardong Pass (...), and Yarkand, an ancient trading center of Sinkiang." He continues, "Leh is on a historic caravan route that leads not only to Yarkand in Sinkiang but to Lhasa in Tibet. (...) the stream of trade. Wool, silver, felts, tea, candy, skins, velvets, silk, gold, carpets, musk, coral, borax, jade cups, salt came down from the north. Cotton goods, shawls, brocades, opium, indigo, plumes, shoes, pearls, ginger, cloves, pepper, honey, tobacco, sugar cane, barley rice, wheat, corn came up from the south." During World War II there was an attempt to transfer war material to China through this route.. Location Khardung La is 39 km by road from Leh. Earlier, the first 24 km, as far as the South Pullu check point, were paved. From there to the North Pullu checkpoint about 15 km beyond the pass the roadway was primarily loose rock, dirt, and occasional rivulets of snow melt. Now, all the way is properly paved. The road approaching the Nubra Valley is very