Estimated winter line · Helvellyn
Nethermost Gully (lefthand branch)
This estimate follows the line at Helvellyn in the Lake District. Check its terrain, then choose a day for snow and avalanche detail.
Model-suggested trace · 4 m LiDAR terrain
01 · The terrain
Terrain profile and steepness
- Estimated length
- 51 m Horizontal distance along the saved line
- Height gained
- 53 m From the estimated base to the top
- Typical bed angle
- 47° Median angle over 25 m sections
- Steeper sections
- 49° Nine in ten 25 m sections are no steeper
Estimated elevation profile
The sampled line runs from about 846 m to 899 m. The saved line faces mainly E. Its steepest measured 25 m section is 49°.
Where it steepens
Share of the saved line at each 25 m bed-angle threshold. This describes terrain, not current snow stability.
How enclosed is it?
The modelled bank-to-bank width is about 13 m where both banks can be resolved.
The bed lies about 3.9 m below its wider surroundings at the median sampled point.
Width and incision come from the terrain surface. They are not measurements taken on the climb.
02 · Choose a day
Snow and avalanche conditions change by date
The terrain profile stays broadly the same, but snow depth, wind loading, cornices and possible avalanche release do not. Open a day in the route explorer to see the model's estimate along this line.
The day assessment is research guidance, not an observation of the route. Small deposits and the exact line may differ from what is shown.
03 · Continue exploring
More at Helvellyn
How to read these measurements
Angles use roughly 25 m stretches along the line, so a short step can be steeper than the number shown. Width is estimated between banks rising 3 m above the bed where both banks are present. Incision compares the bed with surrounding terrain at a wider scale. All figures depend on the estimated line placement.
Terrain measurements are not snow-depth measurements. The dated route assessment uses separate weather, snow and avalanche model inputs.