Crampons are one of the most useful tools in mountaineering—but that doesn’t mean you should wear them every time you step onto snow or a glacier.
In general, you should wear crampons when they decrease your hazard and provide better security. If they don’t, leave them on your pack.
The biggest mistake is thinking, “I’m on a glacier, so I need crampons.” That simply isn’t true. Glacier travel can involve everything from soft, deep snow to firm neve and bare ice, and your footwear should match the conditions.
Crampons Aren’t Always Better
Crampons are designed to give you purchase on firm snow and ice. On hard, frozen surfaces, their points can provide excellent traction. But on soft snow, especially warm, consolidated isothermal snow, crampons may provide little or no advantage.
Isothermal snow is snow that has warmed to approximately 0°C throughout its depth. It can be wet, soft, and unconsolidated enough that crampon points simply sink into it without giving you meaningful additional traction.
If you’re sinking deeply into the snow with every step, crampons probably aren’t helping. In fact, they can introduce additional hazards.
Crampon points are sharp. You can catch a point on your other boot, snag the rope, or trip while stepping over a crevasse or obstacle. If the crampons aren’t providing a meaningful increase in security, you’re accepting these hazards for little benefit.
The goal isn’t to wear more gear. The goal is to reduce risk.
Watch for Snowballing
Another important consideration is whether snow is balling up underneath your crampons.
Most modern mountaineering crampons have anti-balling plates, which help prevent snow from accumulating beneath your feet. Without them, wet snow can build up into thick chunks underneath the crampon.
Once that happens, the crampon points may no longer contact the surface effectively. You can end up walking around on snowballs attached to your boots—a particularly poor substitute for traction.
Even with anti-balling plates, conditions can sometimes cause snow to accumulate. If that happens, stop and clear your crampons rather than continuing to walk with compromised traction.
If You Wear Crampons, Know How to Use Them
Putting crampons on your boots doesn’t automatically mean you know how to climb in them.
Crampon technique is a skill, and it takes practice. On anything more technical than straightforward walking, you may need to use techniques such as the French technique, crossover steps, or other methods of positioning your feet to maintain solid contact with the snow or ice.
You should practice these techniques before you need them in a consequential environment.
It’s also important to understand how your crampons interact with your footwear, your stride, and the terrain. Moving efficiently in crampons is different from simply walking around in boots.
Think of Crampons as a Hazard-Reduction Tool
A useful way to think about crampons is not as mandatory equipment for snow and glaciers, but as a tool for reducing hazard.
Put them on when the surface is firm enough that their points give you better traction and security. Take them off when they’re unnecessary and create more opportunities to trip or catch a point.
The best climbers aren’t the people who use the most equipment. They’re the people who understand when equipment makes them safer—and when it doesn’t.
Learning to make that decision is an important part of becoming a competent mountaineer. At the American Alpine Institute, we teach climbers not only how to use crampons, but how to evaluate snow conditions, choose appropriate techniques, and make good decisions about when crampons actually improve security.
Because sometimes the safest crampon is the one still attached to your pack.