The Humla Limi Valley Trek is a 20-day restricted-area trek in Humla district, Nepal's most remote district, through the Limi Valley along the Tibetan border in the far northwest. The route crosses two high passes -- Nara La at approximately 4,620 m and Nyalu La at 4,940 m -- and passes through three ancient Tibetan Buddhist villages, Til, Halji and Limi, that have been largely isolated from the outside world for centuries.
The trek starts with flights from Kathmandu to Nepalgunj and then to Simikot (2,962 m), the district headquarters, on a STOL runway in a deep Himalayan valley. From Simikot the trail follows the Humla Karnali river through Dharapuri, Kermi and Yalbang before crossing into the Limi Valley, a high-altitude enclave sitting above 3,600 m and bounded by the Tibetan plateau. Halji monastery, known as Rinchenling Gompa, was founded in the 11th century and is still active; it houses over 200 thangkas and is the oldest functioning monastery in the Humla region.
This trek is physically and logistically demanding. There is no road access to most of the route, resupply is limited, the passes require solid fitness and good acclimatisation, and the Humla Restricted Area Permit and Humla Special Permit add a mandatory administrative layer. Days average 5 to 7 hours on rough, high-altitude trail. The sections below cover permits, passes, accommodation, seasons and what to pack.