Kali Gandaki–Mustang corridor (Kora La)काली गण्डकी–मुस्ताङ (कोरला)

The Kali Gandaki was the premier salt corridor of the central Himalaya because geology favoured it twice over: the river cuts clean through the range between Dhaulagiri and Annapurna in a gorge that is the deepest in the world by some measures, and its headwall pass, Kora La, is the lowest crossing of the entire Himalayan chain west of Sikkim — at about 4,660 m, low enough that today it is drivable, described as the lowest motorable corridor between the Tibetan Plateau and the Indian subcontinent. For centuries caravans moved Tibetan salt, wool and livestock down the windy gorge and grain, rice and Indian goods up it: at Tradün in Tibet the Lopas of Mustang loaded plateau salt and carried it down the canyon to the Hindu villages of central Nepal, with the walled kingdom of Lo (Upper Mustang) and the Thak Khola villages living off the through-trade.

What makes this corridor historiographically rich is that its commerce was bureaucratised and documented. A government customs office under the ijara system operated at Dana from at least the 1850s — an 1853 document records the contractor paying Rs 29,001 a year — and in 1862 Jang Bahadur Rana's government began auctioning a salt-trade monopoly every three years, its winner taking the title subba. The first holder was Captain Hem Karna Khadka Chetri; thereafter the monopoly was held predominantly by Thakali families — Balbir Thakali and above all the Sherchan clan of Tukuche. Contract values trace the trade's scale: Rs 82,000 in 1876, Rs 97,000 in 1885, about Rs 150,000 a year — equivalent to roughly 56 kg of gold — in the early 20th century, declining to Rs 110,000 and then Rs 90,000 in the 1920s before abolition in 1927/28. During the monopoly the customs post moved north from Dana to Tukuche, which became the corridor's boomtown, and the subba even exercised judicial authority over the upper Kali Gandaki. The most grain-favourable exchange rate recorded anywhere on the salt routes — 1:36 grain-to-salt — was logged at Lo Manthang, and the Thakali stone-and-timber mansions that the monopoly built still line Tukuche and Dana.

The corridor died twice. The monopoly's abolition opened the trade but ended Tukuche's primacy; free trade then continued until China's takeover of Tibet, when the 1960s border clampdown — sharpened by Mustang's role as base of the CIA-backed Khampa guerrilla war from 1960 to 1972, including the 28 June 1960 “Mustang incident” in which a PLA patrol killed a Nepali officer near Kora La — sealed the pass outright. Dana, once the customs gate of the central Himalaya, emptied into a ghost town of decaying Newar-style mansions; a semi-annual local trade fair at the border survived the closure until the COVID-19 pandemic ended that too.

It is also the corridor where revival is most visible. Korala formally reopened on 13 November 2023, initially for Upper Mustang residents with permits and then for all of Mustang; Nepal's immigration office opened on 30 October 2024; and from 15 September 2025 the crossing became fully operational for international trade — clearing more than 140 cargo containers and 230 electric vehicles in its first days and generating Rs 680 million in customs revenue. With the roughly 186 km Beni–Jomsom–Korala road upgraded and port facilities at Lektse (China) and Nechung (Nepal), the Kaligandaki corridor now links the Indian border at Sunauli to the plateau. Trucking from Korala still costs about Rs 250,000 per truck against Rs 100,000 from Kerung and Rs 50,000 from Tatopani, making goods 5–7% dearer by this route, and Korala–Kathmandu takes 2–3 days — but when monsoon landslides crippled Rasuwagadhi and Tatopani in summer 2025, the old salt road briefly became Nepal's trade lifeline to China again, carrying containers and electric vehicles instead of salt.