Mahale Mountains National Park has no roads: you arrive by light aircraft and then by boat along the shore of Lake Tanganyika, the world's second-deepest lake. The forested slopes hold around 800 chimpanzees, and one community has been studied and habituated since the 1960s, so trekking to find them — anything from twenty minutes to several hours of steep forest walking — gives a real chance of an hour in their company.
Between treks, the lake is the draw: clear enough to snorkel among the hundreds of endemic cichlid species, calm enough to kayak, and backed by a beach that would not look out of place in the Indian Ocean. A minimum age applies for the chimp treks and a basic level of fitness is needed.
Scheduled or charter flight from Dar es Salaam or Ruaha, then a boat transfer to camp. Afternoon to settle in — swim or kayak on the lake.
Early departure into the forest with trackers to find the habituated group. One hour with the chimps. Afternoon on the beach.
Another forest trek, or a day of snorkelling, kayaking and a boat trip along the shore.
Morning boat and flight back to Dar es Salaam or on to Zanzibar.