The Old Trade Road
Parang La is the ancient trade artery between Spiti and Changthang — the route by which salt, wool and horses moved for centuries. From Kibber's crags the trail crosses the 18,300 ft pass onto the glacier-fed Pare Chu, then follows that lonely river across high desert to the shores of Tso Moriri.
The Route
Kibber/Dumla → Thaltak → Borochen → pass crossing → days along the Pare Chu (Datang Yongma, Racholamo) → Kiangdom at Tso Moriri's southern tip → Karzok village. Expect river crossings, vast emptiness, and camps above 15,000 ft throughout.
Requirements and Season
July–September. Very difficult by virtue of sustained altitude and remoteness rather than technicality — full self-sufficiency, acclimatization in Spiti, and inner-line permits for the Ladakh side are required. One of the great wilderness walks of the Indian Himalaya.