Tanzania
Primates unknown to science until 1979 live in these Eastern Arc forests.
The forest never quite dries: canopy over canopy up the Eastern Arc slopes, waterfalls dropping through it, and primates living here that live nowhere else, one of them unknown to science until 1979.
Udzungwa protects nearly 2,000 square kilometres of the Eastern Arc, among the world's richest biodiversity hotspots, and at least six primate species live in its forest: the Sanje mangabey, discovered only in 1979, and the Udzungwa red colobus exist nowhere else on Earth. The Sanje waterfall trail climbs through dense canopy to the falls, June to October keeping trails firm and river crossings low, and Hondo Hondo's forest camp at Mang'ula borders the park and does the cooking.
Solo
Fit solo hikers can book a guide for Sanjes or a longer Udzungwa route and enjoy forest without guaranteed primates.
Friends
Friends with similar fitness can choose deeper plateau routes and keep rare-species sightings as optional rewards.
Hondo Hondo's forest camp at Mang'ula cooks the stay at the park's edge.
Trail days travel on packed lunches; the forest offers shade, not kitchens.

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