Madagascar · Ihorombe
Riandahy Falls
The Riandahy Falls is a waterfall in the region of Ihorombe in Madagascar. They are situated on the Zomandao River in the Andringitra Massif near the Andringitra National Park.
Facts from Wikidata and Wikipedia, compiled September 2026; season and access are our estimate, not a visit report. How we build these pages.
Riandahy Falls drops 300 metres (984 ft) on the Zomandao River, inside Andringitra National Park. It is a plunge-type fall, and the nearest base for a visit is Namoly, Madagascar. Access to the main viewpoint is rated moderate.
Summary adapted from the Wikipedia article (CC BY-SA 4.0).
Riandahy Falls is the second-tallest of the 8 we cover in Madagascar. As a plunge waterfall, water leaves the rock entirely and falls free through the air.
What you can do here
A walk-in-and-look waterfall
No commercial adventures run at Riandahy Falls itself — the experience is the approach and the view. Guided day trips from Namoly are the easiest way to combine it with the area around it.
Also good forHikingPhotographyWildlife & safari
When to go
Summer rains from December to March; peak flow lands in February to April, and late dry season (September to November) can be very low.
Getting there
- Base town Namoly, Madagascar
- Country Madagascar
- Region Ihorombe, East Africa, Africa
- Access Moderate — a real walk — expect stairs, uneven ground or an hour on the trail
How it compares
Most similar
Lofoi Falls
Democratic Republic of the Congo
Height384 mWidth—
Also a plunge waterfall, of similar height and in the Democratic Republic of the Congo
Largest curtain
Victoria Falls
Zimbabwe · Zambia
Height108 mWidth1,708 m
Largest single sheet of falling water
Tallest on earth
Angel Falls
Venezuela
Height979 mWidth—
Widest on earth
Khone Phapheng Falls
Laos
Height21 mWidth10,783 m
Measured across the whole multi-channel system
Angel Falls is 3.3× taller than Riandahy Falls. It drops 2.8× further than Victoria Falls (108 m). We don't have a reliable crest width for Riandahy Falls yet, so it is left off the width chart. Tallest · widest lists.
On the map
-22.1472, 46.89139
Quick answers
Where is Riandahy Falls?
Riandahy Falls is in Madagascar (Ihorombe), inside Andringitra National Park. The nearest base is Namoly, Madagascar. Its coordinates are -22.1472, 46.8914.
How tall is Riandahy Falls?
Riandahy Falls drops 300 metres (984 feet). It is a plunge-type waterfall on the Zomandao River.
When is the best time to visit Riandahy Falls?
Peak flow is February to May. Summer rains from December to March; peak flow lands in February to April, and late dry season (September to November) can be very low.
What can you do at Riandahy Falls?
Beyond the viewpoints: hiking, photography and wildlife & safari. Access to the main viewpoint is rated moderate — a real walk — expect stairs, uneven ground or an hour on the trail.
How do you get to Riandahy Falls?
The usual base is Namoly, Madagascar. A real walk — expect stairs, uneven ground or an hour on the trail from there.
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