Mont Rotui, Mountain summit in Moorea, French Polynesia.

Mont Rotui is a volcanic mountain on Moorea that divides the island's two main bays, Cook Bay and Opunohu Bay, creating a natural landmark. Its sharp rock walls define the island's profile and are visible from many viewpoints around the coast.

Mont Rotui is a volcanic peak of basalt, the rock that makes up nearly all the Society Islands. At 899 m it is Moorea's second-highest summit after Mont Tohiea, and its ridge forms the peninsula separating Cook Bay from Opunohu Bay. The sources record no human history for the mountain itself.

Mont Rotui separates Cook Bay and Opunohu Bay, the two inlets that give Moorea its heart-shaped outline on maps. The name Rōtui is Tahitian, and the mountain appears in the oral traditions attached to these bays, where the valleys of Opunohu and Cook were among the island's early settled districts.

The climb requires good fitness and solid hiking boots because the ascent is steep and takes about two hours to reach the top. Visitors should bring plenty of water and be aware that some sections are blocked off because the rock walls are too dangerous to climb.

Mont Rotui is the second-highest summit of Moorea at 899 m, after Mont Tohiea, and its basalt mass forms the peninsula between Cook Bay and Opunohu Bay. The two photographs show the same profile: bare dark rock on the upper half, dense green scrub below, and a smaller jagged peak just right of the main summit.