| What it is | Starting a climb very early |
| Why | Frozen, stable conditions; safety margin |
| Avoids | Afternoon storms, soft snow, rockfall |
| Difficulty | Intermediate |
An alpine start is beginning a climb very early — often well before dawn — to take advantage of cold, stable conditions and to leave a safety margin for the descent. Frozen snow is firmer and safer in the early hours, rockfall and avalanche risk is lower, and an early start means finishing before afternoon storms.
Why so early
Cold locks snow and loose rock in place, cutting postholing, avalanche, and rockfall risk, and buys daylight for the descent — central to any summit bid and to safe glacier travel.
How early
Often 2-4 a.m. starts, sometimes earlier on long routes.
Frequently asked questions
What is an alpine start?
An alpine start is setting off on a climb very early in the day, frequently in the dark hours before dawn, by headlamp. The goal is to climb while conditions are cold and stable and to give yourself plenty of daylight to finish and descend safely.
Why start a climb so early?
Cold pre-dawn temperatures keep snow frozen and firm (reducing postholing and avalanche risk), lock loose rock in place (reducing rockfall), and let you reach the summit and descend before afternoon heat softens the snow or thunderstorms build.
How early is an alpine start?
It varies with the route, but alpine starts often mean leaving camp at 2-4 a.m., and sometimes earlier or even 'midnight starts' on long, hazardous objectives. The exact time is set by how long the route takes and when conditions turn dangerous.
Sources
- Alpine climbing tactics — American Alpine Club