Autumn is peak hiking season and also when rescue cases cluster. Reading published rescue reports, most incidents begin not with navigation error but with misjudged timing.

First: work backwards from your return. Autumn sunset is markedly earlier than summer, and light disappears sooner still in valleys. Set your must-leave point at one hour before sunset.

Second: temperature swing

Second is the temperature swing. Mountain day-to-night differences can exceed ten degrees, and sweating at midday then chilling at dusk is common. A warm layer and a windproof layer are the two you do not leave behind.

The snowline on a high-altitude route.
The snowline on a high-altitude route.
  • Timing: must-leave point one hour before sunset
  • Temperature: carry warm and windproof layers
  • Communication: do not rely on signal; carry a paper route
  • Tell someone: leave your route and expected return time

Third is communication. Even popular routes have long stretches without signal. Do not hang navigation entirely on a phone; carry a paper route and an offline map.

Fourth is the simplest and most often skipped: before setting off, tell someone not walking with you where you are going and when you expect to be back.