Three days buys you the coast and one cirque, and Cilaos is the one worth the climb: a spa town with its own wine, its own lentils, and a road famous for 400-plus numbered hairpin bends. This plan spends day one in Saint-Denis, day two at the lagoon, and day three up in the mountains, overnight, because Cilaos rewards more than a drive-through. Want a shorter trip? The 2 day weekend skips Cilaos entirely.

Two days on Reunion Island is not enough for the cirques, the volcano, or Mafate, and this plan does not pretend otherwise. It covers exactly two things properly: Saint-Denis on arrival, then a full day on the one stretch of coast where swimming is not banned. Everything else on this French volcanic island waits for a longer trip. Day Focus Drive time 1 Saint-Denis arrival, the Barachois waterfront 10-15 min from Roland Garros airport 2 Saint-Gilles/L’Ermitage lagoon, plus a Maido detour 35-40 min each way Book these before you go

Seven days is the version that actually finishes what six days starts: Saint-Denis, the lagoon, Cilaos, the volcano, Salazie, then two days on Piton des Neiges instead of one, hiking up on day six and pushing to the 3,070m summit before dawn on day seven. That extra morning is the entire point of the mountain, a sunrise over all three cirques with the still-active Fournaise visible on a clear day. Only have six days?

Reunion Island is a French overseas department, not a country and not part of Mauritius, a separate nation roughly 175km away that most people confuse it with. It is also home to one of the most active volcanoes on Earth, a village of 800 people you can only reach on foot or by helicopter, and a west coast where swimming is legally banned outside one protected lagoon. None of that fits the generic “tropical getaway” pitch, which is exactly why most first-time visitors miss all of it.

Four days is the point where Reunion stops being a coastal trip and starts being a volcanic one: Saint-Denis, the lagoon, Cilaos, and then a drive to one of the most active volcanoes on Earth. Piton de la Fournaise erupted across three separate phases between February and April 2026 alone, so this plan treats caldera access as a day-of decision, not a guarantee. Shorter on time? The 3 day plan stops at Cilaos.

Five days adds the third cirque to the loop: Saint-Denis, the lagoon, Cilaos, the volcano, then north into Salazie, the lushest and wettest of the three, where Hell-Bourg’s carved wooden houses sit a short walk from a waterfall most visitors only ever see from a moving car. This is the version that finally covers all three regions of the island without touching Mafate or the Piton des Neiges overnight, both of which need dedicated days of their own.

Six days is enough to add the Piton des Neiges hike to the loop, but only enough to reach the refuge doorstep, not the summit. This plan spends day six climbing from Cilaos up to the Gîte de la Caverne Dufour at 2,478m for an overnight in a basic, cash-only mountain hut, and stops there. The pre-dawn summit push and the sunrise over three cirques belong to the 7 day itinerary instead, one extra day for the actual payoff.