Lake Tanganyika

Lake Tanganyika holds superlatives that take a moment to absorb: the world’s longest freshwater lake (660 km from north to south), Africa’s deepest (1,470 m), the second-deepest on the planet after Lake Baikal, and the second-largest by volume. It is so long that it spans four countries — Tanzania, DRC, Burundi and Zambia — and so deep that its lower layers are permanently anoxic, isolated from the surface world for hundreds of thousands of years. In that isolated upper layer, evolution has produced a biological masterpiece: 250+ species of cichlid fish found nowhere else on Earth.

For travellers, Tanganyika is the anchor of western Tanzania’s most rewarding and least-visited safari circuit. The lake’s two shore parks — Gombe National Park to the north and Mahale Mountains National Park to the south — together protect Tanzania’s only accessible wild chimpanzee populations. The lake between them is an adventure in itself.

Where is Lake Tanganyika?

Tanzania’s share of the lake runs along its entire eastern shore, from Burundi in the north to Zambia in the south. The main Tanzanian access town is Kigoma, a port city in the Kigoma Region served by daily flights from Dar es Salaam and by the Central Line railway. Kigoma is the gateway to both Gombe (16 km north by water taxi) and Mahale (120 km south by charter boat or light aircraft).

The cichlid fish: a snorkeller’s reef

Lake Tanganyika’s cichlid diversity is a consequence of its extraordinary age (estimated at 9–12 million years) and isolation. The lake has never fully dried out or connected to other water systems in the geological record, giving its cichlid populations millions of years to diverge. Over 250 species have been described — from the enormous emperor cichlid (Boulengerochromis microlepis, reaching 80 cm) to tiny shell-dwelling species barely larger than a thumbnail.

The clear, warm water of the northern shore near Kigoma and the beaches at Mahale offers accessible snorkelling in 1–5 metres of water, with dozens of cichlid species visible simultaneously. No specialist equipment is needed — a mask and snorkel reveal an inland reef experience that rivals tropical marine snorkelling in colour diversity.

Ujiji: where Stanley found Livingstone

On the lake shore 8 km south of Kigoma, the village of Ujiji is the site of one of history’s most famous encounters. In November 1871, American journalist Henry Morton Stanley arrived at Ujiji and found the Scottish explorer David Livingstone — who had been out of contact with the outside world for six years — and reportedly greeted him with the understated: “Dr Livingstone, I presume?” A monument and small museum at the site mark the occasion. It is a 30-minute visit with outsized historical resonance.

The MV Liemba lake ferry

One of East Africa’s most romantic travel experiences is the MV Liemba — a lake ferry that has been travelling the Tanzanian shore of Tanganyika since 1927, originally built for the German navy. The Liemba connects Kigoma with shore villages and Zambian ports on a multi-day schedule, stopping at Gombe, Mahale and dozens of fishing communities. Travellers with time can book a cabin and travel the length of Tanzania’s lake shore — an extraordinary journey that few do but everyone who has describes as unforgettable.

Combine Lake Tanganyika with…

• Gombe National Park — Jane Goodall’s research site, 16 km from Kigoma.
• Mahale Mountains — the luxury chimp experience, 120 km south.
• Katavi National Park — the western Tanzania big-game complement.

Frequently asked questions about Lake Tanganyika

Is Lake Tanganyika safe to swim in?

Generally yes in the clear, wave-washed northern shore areas near Kigoma and the Mahale/Gombe beaches. Bilharzia risk is low in deep, clear water. Crocodile and hippo are present in river mouths and papyrus beds — always check local conditions before swimming.

How deep is Lake Tanganyika?

Maximum depth of 1,470 metres, making it Africa’s deepest lake and the second-deepest in the world after Russia’s Lake Baikal.

How many countries border Lake Tanganyika?

Four: Tanzania (east), Democratic Republic of Congo (west), Burundi (north) and Zambia (south).

Can you dive in Lake Tanganyika?

Yes — several dive operators based in Kigoma offer guided dives. The visibility and fish diversity are exceptional. The diving equivalent of a tropical coral reef, with entirely freshwater species.