When climbing mixed rock and ice, when should you wear crampons?

Wearing crampons is primarily designed to provide adequate traction on icy surfaces, making their use essential in conditions where ice is present. When climbing mixed rock and ice, crampons should be utilized specifically on ice sections since they significantly enhance grip and stability on slippery terrain. This allows climbers to navigate steep or technical ice features safely.

In mixed climbing, it is common to encounter different types of surfaces. While rock provides a solid footing, it does not necessitate crampons, as they can actually be counterproductive if the rock is not icy. The effectiveness of crampons is specifically aligned with the characteristics of ice; they are engineered to penetrate the ice and reduce the risk of slipping. Therefore, the appropriate time to wear crampons is during the ascent or descent on ice sections, ensuring safety and efficiency in movement.

For the other scenarios, wearing crampons only on rock sections, only during descent, or if 50% of the climb is suitable for crampons does not align with the primary function of crampons or the best practices for safety in mixed climbing conditions. Each of these approaches could lead to unnecessary risks or complications in climbing effectively.