Skiing ungroomed terrain: adapt radius, pressure and speed to changing snow – and why avalanche training, rescue gear and a guide come before technique.
Skiing ungroomed terrain means continuously adapting radius, pressure and speed to changing snow – and first clarifying whether the terrain is safe at all. Technique is the smaller part. This guide explains the skiing technique; it does not replace avalanche training or a mountain guide.
The honest answer on how serious this is: in a Swiss study of 1619 injured people, skiing outside marked pistes was independently associated with an increased risk of knee injuries [1]. And in avalanche accidents time is decisive: in an analysis of 1643 critically buried people, 91% survived rescue within 10 minutes, while only 31% survived rescue between 10 and 30 minutes [4]. Where buried people were only recovered by organised rescue teams, just 22.9% survived [4]. So whoever digs you out in the decisive time is your companions – and for that they need equipment and training.
The German Alpine Club puts it like this: avalanche transceiver (LVS), probe and shovel belong on every trip in unsecured winter terrain [2]. According to the Alpine Club an avalanche course should be "mandatory at the start of a winter sports career" [2].
Before you think about technique: read the avalanche bulletin, discuss terrain and route with a mountain guide. If you have no training for that, you do not go into the terrain alone. Milestone: you have completed an avalanche course and only go with qualified company.
Practise the building blocks on the piste: vary radius, dose pressure, adapt speed. The association's teaching-practice topics list for this among others "parallel turns with variable track layout" and "improve turn steering" [7].
In ungroomed snow you usually ski wider arcs than on ice, but with controlled speed. Breakable crust, deep snow and wind-pressed snow demand different reactions; a mountain guide shows them to you in the terrain.
Load both skis more evenly than on the piste. The ski sinks to different depths; changing snow layers demand soft legs. That is a feeling you only learn in the terrain, not from a guide.
Only ski what you control. FIS Rule 2 applies analogously in the terrain: adapt speed and manner to ability, terrain and snow [6].
Ski in a group, with agreements, and one by one in avalanche-prone slopes. You learn the concrete tactics in the avalanche course, not here.
Fix: training, equipment, company – then technique.
Learn the technique first on the piste in spring slush or on a fresh-snow layer. Soft snow on a groomed piste is a safe practice space for pressure and radius. It does not replace the terrain but gets you there prepared.
A preparation plan (practice, no study evidence):
Only when these four steps are in place is skiing technique the next topic.
That is not recommended. The Alpine Club considers an avalanche course mandatory at the start of a winter sports career and transceiver, probe and shovel indispensable in unsecured terrain [2].
Time is decisive. In a Swiss analysis 91% survived rescue within 10 minutes, 31% rescue between 10 and 30 minutes [4]. Companions must be able to search.
No. The Alpine Club says the airbag complements but does not replace transceiver, probe and shovel [2]. In a survey, airbag carriers more often reported taking more risk [5].
In a Swiss study of 1619 injured people, skiing outside marked pistes was independently associated with an increased risk of knee injuries [1].
Skinning Technique: Glide, Don’t Stomp