Nepal's Last Forbidden Kingdom Stayed Closed Until 1992, and Getting In Just Got Far Cheaper

Most travellers who've heard of Upper Mustang know it by its nickname, the Forbidden Kingdom — but few know how literally that name was earned, or that Nepal just rewrote the rule that decided who could afford to go.

The history explains the secrecy better than any marketing copy could. In 1960, the CIA and Tibetan resistance leaders set up a guerrilla base inside Mustang, training and arming more than 4,000 Khampa fighters to strike across the border into occupied Tibet. Washington funded the operation until 1972, when Richard Nixon normalised relations with Beijing and pulled the plug; the Tibetan fighters carried on alone for two more years until Kathmandu, under pressure from China, sent its own army in to disband the camp in 1974. Even after the guerrillas were gone, Nepal left Mustang off the map for any foreign traveller for another eighteen years, wary of its sensitivity so close to the Tibetan border.

When the government finally reopened Upper Mustang in 1992, it did so by pricing most people out. The original restricted-area permit ran to roughly $700 for the first ten days, deliberately capping visitor numbers at around 1,000 a year to protect a landscape with almost no tourist infrastructure. The fee later settled at a flat $500 for the first ten days plus $50 for each additional day — which meant a rushed three- or four-day jeep tour to Lo Manthang cost exactly the same as a leisurely two-week trek. From 2025, Nepal's Department of Immigration scrapped that structure altogether: the permit is now a flat $50 per person per day, with no minimum charge at all.

Inside the walls that made it famous, Lo Manthang hasn't changed nearly as fast. The city Ame Pal founded in 1380 still holds barely 200 households inside its perimeter wall, and scholars regularly call it one of the best-preserved medieval walled settlements left standing anywhere. The kingdom kept a hereditary ruler, the Raja of Lo, right through the restricted-visitor era — Jigme Dorje Palbar Bista held the title from 1964 until Nepal abolished its own national monarchy and, with it, recognition of Mustang's, in 2008. Locals kept calling him king anyway until his death in 2016 at age 86, and Lo Manthang still marks the royal lineage as part of its identity today.

What this means for trekkers

Sources: Wikipedia, “Upper Mustang” and “Jigme Dorje Palbar Bista”; Small Wars Journal, “The CIA in Tibet, 1957–1969”; Nepal Economic Forum, “What is the State of Tourism in Mustang?”; 2026 permit-fee reporting via northnepaltrek.com and adventuremastertrek.com.

Cover photo: Gerd Eichmann via Wikimedia Commons (CC BY-SA 4.0).