Helambu
OSM hiking route Helambu, Nepal (43.41 km line). Permits are the headline (official NTB/NTNC 2026-09-21). Vertical figures from the Wave N GLO-30 resample.
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Distance 43.41 km Reported · Ascent provisional (DEM sample) · High point provisional (DEM sample) · 6d · SAC T2 · Moderate (OSM hiking)
Cite this record
The Hiking World, Helambu, read 2026-09-21, https://www.thehikingworld.com/trails/helambu
How we verify · last checked 2026-09-21
Byline
- The Hiking World editorial team · author
Figures marked provisional are seed data and still need verification. Source and last-checked date sit under each cited value.
Forecast at page generation, 2026-11-04T22:08:43.945Z
Representative point on Helambu: 27.858°, 85.460°, about 3670 m. A forecast, not a trail-surface reading.
At generation: -3°C, Mainly clear.
- 2026-11-05 Mainly clear, -3–7°C
- 2026-11-06 Clear, -3–8°C
- 2026-11-07 -2–7°C, 0 mm
Source Open-Meteo. Mountain weather changes with elevation and aspect.
Life-safety notices on this page come from the issuer.
Altitude weather delta
High 3,670 m minus low 1,738 m is 1,932 m of relief on this record. A standard tropospheric lapse of 6.5 °C per 1,000 m implies about 12.6 °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 · read 2026-09-10 · provisionalISA 6.5 °C / 1,000 m · wikipedia.org · 2026-09-10
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GeoJSONLine download is the stored OSM geometry, simplified. It is not a surveyed GPS track. GPX · GeoJSON
Catalog entry
Moderate (OSM hiking)
- 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.
Stored distance is 43.41 km. The chart axis follows the DEM sample (39.27 km), not the published line length.
Ingested from OpenStreetMap relation 4867728 (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 43.41 km (OSM line, ODbL, relation 4867728, lastVerified 2026-09-21). Provisional — OSM line, no official kilometre. ⚠ Incomplete geometry: 3 components with a 195 m gap. Distance stays provisional. ⚠ secondary: operator itineraries cite about 60 km. Cited km is not this figure. disjoint:3 gap 195 m. Often combined with gosaikunda (relation 4867746) — relate-not-merge.
typicalDays 6 is the published typical window (operator, secondary), not a figure and not implied by the OSM kilometre.
High 3,670 m is Copernicus GLO-30 (lastVerified 2026-09-21), verified on the walked OSM line. Low 1,738 m is the same DEM resample, verified. Ascent 1,700 m / descent 3,546 m remain provisional DEM. Landmark Tharepati Pass 3,650 m (Wikipedia; DEM high 3,670 m is the walked 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). Part of the itinerary sits in Langtang NP.
Water
No water sources recorded.
Permits & fees
Conditions, fees and rules change. Confirm with the issuer and local authorities before you go. This is a reference, not a substitute for local advice. Terms
- Permit
- Langtang NP entry + TIMS card
Permits and fees
We are not the issuer. Fees and rules change — confirm with the issuer before you pay. Issuer page.
| Permit | Cost | Quota / restriction | Issuer | Source | Checked |
|---|---|---|---|---|---|
| Langtang NP entry + TIMS cardUnverified — not officially sourced | Not recorded | — | Not recorded | Issuer page | Unverified |
Hazards
- Altitude / AMS: GLO-30 high 3,670 m on this line (Tharepati Pass 3,650 m (Wikipedia; DEM high 3,670 m is the walked line)). This is a high-altitude trek, not a casual hike.
- Related records gosaikunda, langtang-valley share geography — relate-not-merge.
Getting there
Sourced legs to the Sundarijal / Melamchi 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.
Road · Kathmandu (KTM) → Sundarijal / Melamchi road heads
Road or local bus from Kathmandu to the published Helambu road-heads (Sundarijal, Melamchi). Langtang NP entry (part) + TIMS (https://ntb.gov.np/en/plan-your-trip/before-you-come/tims-card, checked 2026-09-21).
ntb.gov.np · read 2026-09-21 · provisional
Relate gosaikunda, do not merge. OSM line start is the stored vertex.
Plan from your location
Type a city, then pick a match. These links open external search tools — they do not fetch fares or timetables.
Getting there car-free
- OSM line start: car-free flag unknown.
- OSM line end: car-free flag unknown.
Trailheads
- OSM line start car-free: unknown
- OSM line end car-free: unknown
Questions
Do I need a permit for Helambu?
A permit is listed as required for Helambu: Langtang NP entry + TIMS card. Status: Unverified. This desk does not treat that as an official ruling.
When is the best time to hike Helambu?
On this record the best season is: Sep–May (NTB / NTNC; all-year accessible lower valleys, checked 2026-09-21).
How difficult is Helambu?
Helambu is graded OSM sac_scale: hiking · SAC T2 · YDS 1. A sourced hazard on this record: Altitude / AMS: GLO-30 high 3,670 m on this line (Tharepati Pass 3,650 m (Wikipedia; DEM high 3,670 m is the walked line)). This is a high-altitude trek, not a casual hike.
How long is Helambu?
The length on this record is 43.41 km (reported). Published figures may differ. See /guides/how-long-is-the-trail
How do I get to Helambu?
The record’s base start is Sundarijal / Melamchi approaches. A primary gateway on the record is Tribhuvan International Airport (KTM). Trailhead transit notes are not included in this public FAQ.
Related trails
- GosainKunda Trek · Langtang
- Langtang Valley · Langtang
- Annapurna Base Camp · Nepal
- Annapurna Circuit · Nepal
- Dudh Pokhari Lake · Nepal
- Everest Base Camp · Nepal