| What it is | Hard layer that breaks under weight |
| From | Refreeze, sun crust, or wind |
| Why hard | Skis catch & break through unpredictably |
| Technique | Jump turns, survival skiing |
Breakable crust is a surface layer of hard, refrozen or wind-formed snow that’s strong enough to partly support you but breaks under your full weight, dropping you into softer snow beneath. It’s one of the most difficult and frustrating conditions to ski, because the skis catch and break through unpredictably; jump turns and survival skiing techniques are often needed.
Surviving it
A nasty form of crud where the jump turn shines; related to wind and sun crusts.
Frequently asked questions
What is breakable crust?
Breakable crust is a hardened surface layer of snow — formed by refreezing, sun, or wind — that's firm enough to hold you for a moment but then cracks and gives way under your full weight, dropping your skis into the soft snow below. The result is an inconsistent, grabbing surface that's notoriously hard to ski.
How do you ski breakable crust?
It's one of the hardest conditions, but tactics include jump turns or hop turns to lift the skis out and pivot in the air, keeping a balanced centered stance, minimizing edging that catches the crust, and sometimes simply 'survival skiing' with cautious, defensive turns. Choosing different aspects or waiting for better snow is often wiser.
What causes breakable crust?
A surface that melts and refreezes (sun or temperature crust), or that's stiffened by wind, forms a hard skin over softer snow. If that skin is thick enough to feel supportive but too weak to hold your weight in a turn, it becomes breakable crust. The same processes can also create stronger crusts that ski fine when fully supportive.
Sources
- Difficult snow — PSIA-AASI
- Variable conditions — The Mountaineers