How far back from a cornice edge should I stay to be safe?

It depends—there's no universal safe distance because cornices can fracture several metres behind the visible edge. The best approach is to stay well away from ridge edges altogether using navigation techniques, rather than trying to judge a specific distance.

Which side of a ridge do cornices form on?

Cornices form on the lee side—the side sheltered from the wind. In the UK, westerly winds typically build cornices on easterly-facing aspects, so if you're walking with the wind at your back approaching a ridge, you're heading toward the potential cornice side.

What should I do if I realize I'm standing on a cornice?

Move slowly and deliberately back toward ground you know is safe, avoiding sudden weight shifts. Don't move closer to the edge, and if you're with others on the same suspect area, avoid loading it all at once.

Common Hazards

The Cornice Problem: When a Cliff Edge Is Further Back Than It Looks

Cliff edges crumble, cornices collapse and both look deceptively solid until your weight shifts the balance. Understanding how far back from the edge is actually safe, recognising cornice formations in winter and knowing that firm-looking snow overhangs empty air prevents the falls that happen to careful people.

13 September 20267 min read