Mauritius measures roughly 65 kilometres north to south and about 45 across, and that smallness is the trap. On a map it reads as a place you could cover comfortably from one hotel, so most visitors book one and try. Then they discover that the island has no coastal ring road worth the name, that the motorway runs up the middle rather than around the edge, and that crossing from the east coast to the west eats between an hour and an hour and a half of daylight in each direction. A week spent commuting to the good parts is not the same thing as a week in Mauritius.
The fix is not more days. It is fewer hotels doing more work. Eight nights, split between two bases on opposite corners of the island, with the drive between them treated as a day of the itinerary rather than as a chore, gets you the lagoon, the mountains, the capital and the wild south coast without ever repeating a road. What follows is that route in order, with what to book in advance, what to leave out, and roughly what the whole thing costs.
The shape of the island, and why two bases beat one
Start with the geography, because it dictates everything else. The international airport sits in the south-east, near Plaine Magnien, a short drive from Mahebourg. That is a gift: it means your first base can be the corner of the island you land in, and you are not spending your arrival evening crossing the country with jet lag.
From there the island divides into five characters. The north, around Grand Baie, is the busy one, with the most bars, the most boat operators and the most traffic. The east is a long, shallow, pale lagoon lined with resorts, and it catches the trade wind, which is either refreshing or relentless depending on your tolerance. The west, around Riviere Noire and Le Morne, is drier and more dramatic, with mountains falling almost into the sea and the island's reliable sunsets. The south is the wild side, where in places the reef gives out and the ocean hits basalt cliffs directly. And the centre is a plateau of towns and forest that most visitors only glimpse through a car window, which is a mistake.
Two bases, then: four nights in the south-east around Blue Bay and Pointe d'Esny, then four nights in the west at Le Morne or Riviere Noire. Everything on this list falls within about forty-five minutes of one or the other, and the transfer between them is itself one of the island's best drives. Adding a third base in the north is possible but rarely earns its cost in packing time; the north is better done as one long day out, or skipped entirely if quiet is what you came for.