Isalo National Park

Rock FormationsIhorombe,Madagascar

Ochre sandstone canyons in Madagascar's dry south that look like desert but hide shaded streams, palms and spring-fed pools, with Bara tombs in the cliffs.

September·Peaking now

Sep–Oct

The hot, bone-dry end of the dry season: the savanna browns and days climb toward 30°C, but the spring-fed Piscine Naturelle runs clearest and the Fenêtre de l'Isalo blazes red at sunset. Everything stays open.

Year-round The eroded sandstone canyons, spring-fed pools and the Fenêtre arch are here year-round; the dry season, April to October, is the hiking window, and sunsets glow through the stone arch.

Isalo National Park is a maze of ochre sandstone canyons, domes and jagged pinnacles in Madagascar's dry south. From a distance the massif looks like pure desert; the nickname here is "Madagascar's Colorado." The surprise is what the canyons hide: narrow gorges with shaded streams, pandanus palms and spring-fed pools, green ribbons of life folded inside dry stone. The best known is the Piscine Naturelle, a clear pool ringed by palms and fed by cool springs, cold enough to shock after a hot climb. The rock is sandstone that braided rivers laid down more than 200 million years ago, worn into this relief by wind and water since. Created as a park in 1962 and covering more than 800 square kilometres, Isalo is Madagascar's most visited park and its premier hiking ground, where marked trails climb from savanna floor to plateau. Walking here means long, shadeless stretches of grass and rock, broken by sudden drops into cool canyons. Down there ring-tailed lemurs and white Verreaux's sifakas move through the trees, and squat pachypodiums — the "elephant's foot" plants — grip the bare crevices. The massif is also sacred ground: for generations the Bara, southern Madagascar's cattle herders, have used its cliffs as tombs. At its western edge stands the Fenêtre de l'Isalo, a natural sandstone arch where visitors gather at dusk to watch the sun drop through the opening and set the stone glowing red. When the light fades and the savanna cools, the park grows quiet and the night sky comes out clear over the plateau.

Worth knowing

Good to know

Every trek needs a licensed local guide by park rule — you cannot walk any circuit alone, and it is the guide who reads the Bara tomb sites on the cliffs for you.
Circuits run from about three hours to a four-day traverse — anything past a single day means sleeping inside the park at fixed camps such as Namaza, which holds thirty-odd tents.
Bring a swimsuit for the Piscine Naturelle — the pool is spring-fed and stays cold all year, and it runs clearest late in the dry season when nothing is washing into it.
Set out at first light and again near sunset — lemurs feed in the cool hours and the low sun warms the sandstone, while midday leaves you exposed on the shadeless plateau.
Carry more water than you think and cover up — long trails cross open rock with no shade at all, and the dry heat tires hikers far faster than they expect.

Things to do

1
Cool off in the Natural Pool
Climb down into the canyon to the Piscine Naturelle, a clear pool ringed by palms at the foot of the sandstone walls. The water comes straight out of the rock and stays cold enough to shock after a hot walk across the open plateau. Most walkers save it for the middle of the day's trek rather than the start.
2
Drop into a canyon for shade and lemurs
Cross the open plateau of grass and bare rock, then drop through a gap in the wall into one of Isalo's canyons. The change is immediate: the floor is shaded and damp, and a stream runs beneath pandanus palms. Watch the trees along the water for ring-tailed lemurs and for Verreaux's sifakas, the white lemurs that leap from trunk to trunk overhead, most active in the cool hours at either end of the day.
3
Trek among the wind-cut spires
Follow the marked plateau trails out among the wind-cut sandstone spires and flat-topped domes that earn Isalo its 'Colorado' nickname. Walk this open, shadeless stretch in the cool early hours rather than at midday, when the bare rock leaves nowhere to escape the heat.
4
Look up at the Bara tombs
The tombs sit in hollows and ledges high in the sandstone walls above the canyon floors, and the harder a niche is to reach, the greater the honour it carries. These are graves still in use, not ruins, so you look at them from the canyon floor and keep your distance. From down there the piled stones and the zebu skulls on the ledges are clear enough.
5
Reach the Fenêtre de l'Isalo before dusk
Walk out to the natural rock arch off the road south of Ranohira and get into place before the light goes, since the massif holds its red glow for only a few short minutes. Stand to the west so the sinking sun sits inside the window, then linger as the savanna cools and the stars come out over the plateau.

Watch

Nearby

275 km

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