Descend with care

1. Weather comes first

The number-one danger in a canyon is the flash flood. A storm several kilometres upstream can turn a trickle into a torrent within minutes. Check the forecasts, turn back at the slightest doubt, and learn to read the signs of rising water: the water clouding over, debris floating past, the noise growing louder.

2. Never go alone

A canyon is descended as a group, ideally three to six people, with at least one experienced member who knows the route. Tell someone your itinerary and your expected return time.

3. Check your gear

• A wetsuit matched to the water temperature.
• Helmet and harness inspected, descender and lanyards in good condition.
• A rappel rope of the right length, plus a backup rope.
• A dry bag with a survival blanket, whistle and first-aid kit.

4. Recognise water traps

Sieves and pin-down currents (water pushing against a wall) and hydraulics (recirculating rollers below a waterfall) are the major technical dangers. Learn to identify them from the route description and to avoid them. When in doubt about a pool, never jump without first checking the depth and that it is clear of obstacles.

5. Respect the environment

Gorges are home to fragile wildlife and plant life. Stay in the watercourse, leave no trace, and respect local regulations and seasonal closures tied to wildlife breeding.