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Lake Boundouni

A brackish crater lake on Mohéli, a Ramsar wetland with waterbirds on it.

Updated 2 October 2026

WhereMohéli
Nearest cityFomboni
Best seasonMay to October
Time to allowHalf a day
Getting thereOn the southeastern side of Mohéli; road from Fomboni then a walk
EntryFree; guide advised

Lake Boundouni sits near Mohéli's southeastern coast, a brackish crater lake connected to the sea through the rock and designated a Ramsar wetland in 1995, the first of three in the Comoros. Herons, egrets and waders use it, and the vegetation around the edge is dense. Bats roost in the trees nearby. The lake is small and the walk in from the road takes a short while through scrub. The lake is around two kilometres long and sits close enough to the sea that its water is salt rather than fresh.

What's there

  • The crater lake - brackish water in an old vent near the coast.
  • The waterbirds - herons, egrets and waders on the margins.
  • The Ramsar status - the country's first listed wetland.
  • The vegetation - dense growth closing around the lake edge.

When to go

May to October is the drier and cooler season. Water levels vary with the rains. Early morning is best for birds.

Before you go

The lake is small and the visit is short. There is no infrastructure and the path in is unmarked. Mosquitoes around the water are severe.

Nearby

Itsamia is east, and Fomboni is northwest.

What to pack for Lake Boundouni

Chosen from what this place is for. Tap a kit for the full checklist.

  • Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
  • Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon
  • Daypack with rain cover - 20-30 litres holds water, snacks, layers and a first-aid kit. Find on Amazon
  • Offline maps + a power bank - Download the trail before you lose signal; carry backup charge. Find on Amazon

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Plan your trip

Where to start if Lake Boundouni is going on the list.

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