Lac de Belledonne gives a stay a true alpine tone: water, rugged slopes and a strong feeling of open space.

The hike needs proper planning, but it rewards walkers with a wilder atmosphere and high-mountain scenery.

From Casa Dahu, keep it for a stable-weather day, with good shoes and an unhurried pace.

Good to know

• Plan a full-day hike depending on the chosen route.
• Suitable footwear, water and a weather check are essential.
• Best enjoyed in clear weather and away from difficult conditions.