The park's crown is Imarivolanitra, the peak long known to climbers as Pic Boby. At 2,658 meters it is the second-highest mountain in Madagascar, a hump of weathered granite reached by one of the great walks in the Indian Ocean. The classic route climbs from rainforest at around 700 meters through cloud forest and onto open alpine moorland, a three-day traverse that crosses ecosystems most travelers would have to fly between continents to see. Reaching the summit means sleeping at least one night at altitude, where the cold bites hard from April to September and the thermometer can fall below freezing for months at a stretch. The reward at the top is a view across a buckled landscape of valleys and ridges, the granite glowing pink at sunrise and the lowlands spread out far below like a relief map. Few summits anywhere ask so little technical skill and give back so much.

Andringitra is a study in vertical extremes. The reserve spans some 31,160 hectares and climbs nearly two kilometers from base to peak, and the climate shifts with every few hundred meters of elevation. Rainforest cloaks the eastern slopes, where mean annual rainfall reaches around 1,500 millimeters and water feeds the Ampanasana, Iantara, Menarahaka, and Zomandao rivers that thread off the massif. Higher up, the trees thin into heathland and bare rock scoured by wind and frost. The dramatic squeeze of so many habitats into so small a footprint is why the park shelters such a dense tangle of life, from lemurs in the canopy to plants that grow nowhere else on Earth.

People share these slopes, and they have divided the mountain among themselves with a logic refined over generations. In the south and west, the Bara herd zebu cattle across the savannah, the valleys, and the high ridges, following grass and water the way their ancestors did. To the east, the Bara Haronga grow rice. On the northern flanks, the Betsileo have carved an intricate system of irrigated terraces into the steep ground, coaxing paddies out of land that looks too sheer to farm. For all three peoples the mountain is more than scenery; it is pasture, field, and the home of ancestors whose graves are tended on its slopes. Each community reads the same granite differently, and together they make Andringitra a place where conservation and human life are braided rather than separated, a model increasingly held up as the way protected areas should work.

Outsiders noticed Andringitra's importance early. Explorers remarked on it in the first decades of the twentieth century, and in 1927 the central range was set aside as a strict nature reserve. Real change came in the 1990s, when the Malagasy Environmental Action Plan shifted ownership of conservation from foreign donors to Madagascar itself. The area became a full national park in 1999, managed by Madagascar National Parks. In 2007 it joined the Rainforests of the Atsinanana, a cluster of six parks inscribed together on the UNESCO World Heritage List for sheltering species found nowhere else after the island's hundred-million-year isolation.