Grand Etang
The largest natural lake on the island, in a valley below a high waterfall, reached by an easy walk.
Updated 21 October 2026
Grand Étang is the largest natural body of standing water on Réunion, formed when a lava flow dammed a valley, with no outflow, and it sits in a bowl of green walls fed by a short creek from the Cascade Biberon on the Bras d'Annette, which drops down the rock face at the head of the valley. A flat walk of about forty-five minutes from the car park reaches the lake, and a circuit continues around it and up towards the base of the fall.
What you'll find
- The lake - the largest natural standing water on the island.
- The Cascade Biberon - the tall fall on the Bras d'Annette at the valley head.
- The circuit walk - the route around the lake and towards the fall.
- The valley walls - the vegetated cliffs enclosing the basin.
When to go
May to November is the drier season. The waterfall is strongest after rain. The lake level varies greatly and it can shrink considerably in dry spells.
What to expect
The lake dries back substantially in dry years and can look poor. The circuit is muddy and involves river crossings that are dangerous after rain. Swimming is not permitted.
Nearby
Plaine des Palmistes is southwest, and Saint-Benoit is northeast.
Key facts
Source: Wikidata, item Q3114853, read on 18 October 2026.
What to pack for Grand Etang
Chosen from what this place is for. Tap a kit for the full checklist.
- Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
- Quick-dry towel - A microfibre towel packs small and dries in minutes. Find on Amazon
- Water shoes - Protect your feet on rocky entries, hot sand and sea-urchin spines. Find on Amazon
- Dry bag - Keeps phone, cash and keys safe while you are in the water. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.



