The Hiking World

Langtang Valley

OSM hiking route Langtang Valley, Nepal (30.97 km line). out-and-back; one-way 30.97 km, round-trip 61.95 km in prose. Permits are the headline (official NTB/NTNC 2026-09-21). Vertical figures from the Wave N GLO-30 resample.

Byline

  • The Hiking World editorial · author

    Desk byline for seed records. Named surveying editors replace this once a trail is verified.

Langtang Lirung above the Langtang Valley, Nepal

Figures marked provisional are seed data and still need verification. Source and last-checked date sit under each cited value.

Altitude weather delta

High 3,864 m minus low 1,437 m is 2,427 m of relief on this record. A standard tropospheric lapse of 6.5 °C per 1,000 m implies about 15.8 °C cooler at the high point than the valley, all else equal.

That is a model (International Standard Atmosphere environmental lapse), not a forecast and not a trail-closure. Wind, snow, and storms stay in Hazards.

derived:lapse-rate · 2026-09-10 · provisional

ISA 6.5 °C / 1,000 m · wikipedia.org · 2026-09-10

loading map...
Facts28.166, 85.342
Distance30.97 km*
OSM line (ODbL, rel 1269089) · 2026-09-21 · osm · provisional
Ascent+2,761 m*
Copernicus GLO-30 (30 m resample) · 2026-09-21 · dem · provisional
Descent4,872 m*
Copernicus GLO-30 (30 m resample) · 2026-09-21 · dem · provisional
High point3,864 m
Copernicus GLO-30 · 2026-09-21 · dem
Low point1,437 m
Copernicus GLO-30 · 2026-09-21 · dem
Routeout-and-back
Days8
SeasonMar–May and Sep–Nov (NTB / NTNC walking season, checked 2026-09-21)
GradeOSM sac_scale: hiking · SAC T2 · YDS 1

Editorial v1 · Provisional catalog

DifficultyOSM sac_scale: hiking

Moderate (OSM hiking, OSM trail_visibility excellent)

SAC T2
Mountain hiking. Continuous trail, some steep ground, sure-footedness helpful.
YDS Class 1
Class 1. Walking on an established path; low fall risk.
openstreetmap.org · 2026-09-21
Wikidata Q106773672

Log in to view the elevation profile

Ingested from OpenStreetMap relation 1269089 (ODbL). The mapped line is that geometry. Distance, ascent, descent, and high/low points are the Wave N evidence-sheet figures (adjudicated 2026-09-21). Permits are official-sourced; geometry stays OSM-provisional. Water was not mapped to named WaterSource points.

OSM 2D length is 30.97 km (OSM line, ODbL, relation 1269089, lastVerified 2026-09-21). Provisional — OSM line, no official kilometre. Out-and-back: the published DataPoint is the one-way 30.97 km; round-trip is about 61.95 km in prose only. ⚠ secondary: operator itineraries cite about 70 km. Cited km is not this DataPoint. Out-and-back: publish one-way. Relate helambu / gosaikunda, do not merge.

typicalDays 8 is the published typical window (operator, secondary), not a DataPoint and not implied by the OSM kilometre.

High 3,864 m is Copernicus GLO-30 (lastVerified 2026-09-21), verified on the walked OSM line. Low 1,437 m is the same DEM resample, verified. Ascent 2,761 m / descent 4,872 m remain provisional DEM. Landmark Tserko Ri 4,984 m / Kyanjin Ri 4,773 m (Wikipedia; DEM high 3,864 m is this OSM line).

Langtang National Park entry is required (https://ntb.gov.np/en/plan-your-trip/before-you-come/park-entry-fees, checked 2026-09-21); the park-table amount was not copied onto this sheet this pass — confirm live. TIMS NPR 2,000 foreign / NPR 1,000 SAARC (https://ntb.gov.np/en/plan-your-trip/before-you-come/tims-card, checked 2026-09-21).

Water

No water sources recorded.

Permits & fees

Permit
Langtang NP entry + TIMS card

Log in to view cost, booking, and issuer

Getting there

Sourced legs to the Syabrubesi approaches base start station — where this trail record begins. This is not a route planner: durations are approximate and marked provisional until an official transport page confirms them.

  1. Road · Kathmandu (KTM) → Syabrubesi

    Road north from Kathmandu to the published Syabrubesi trailhead. Langtang NP entry and TIMS are the official permits (https://ntb.gov.np/en/plan-your-trip/before-you-come/park-entry-fees, checked 2026-09-21).

    ntb.gov.np · 2026-09-21 · official · provisional

No rail. OSM line start is the stored vertex, not an invented village pin.

Plan from your location

Type a city, then pick a match. These links open external search tools — they do not fetch fares or timetables.

Trailheads

  • OSM line start car-free: unknown
  • OSM line end car-free: unknown

Log in to view trailhead transit detail

Hazards

  • Altitude / AMS: GLO-30 high 3,864 m on this line (Tserko Ri 4,984 m / Kyanjin Ri 4,773 m (Wikipedia; DEM high 3,864 m is this OSM line)). This is a high-altitude trek, not a casual hike.
  • Related records helambu, gosaikunda share geography — relate-not-merge.

Questions

Do I need a permit for Langtang Valley?

A permit is required for Langtang Valley: Langtang NP entry + TIMS card. Cost, booking, and issuer stay behind the login gate on this page.

When is the best time to hike Langtang Valley?

On this record the best season is: Mar–May and Sep–Nov (NTB / NTNC walking season, checked 2026-09-21).

How difficult is Langtang Valley?

Langtang Valley is graded OSM sac_scale: hiking · SAC T2 · YDS 1. A sourced hazard on this record: Altitude / AMS: GLO-30 high 3,864 m on this line (Tserko Ri 4,984 m / Kyanjin Ri 4,773 m (Wikipedia; DEM high 3,864 m is this OSM line)). This is a high-altitude trek, not a casual hike.

How long is Langtang Valley?

The length on this record is 30.97 km (provisional). Published figures may differ. See /guides/how-long-is-the-trail

How do I get to Langtang Valley?

The record’s base start is Syabrubesi approaches. A primary gateway on the record is Tribhuvan International Airport (KTM). Trailhead transit notes are not included in this public FAQ.

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