Retima Hippo Pool: The Serengeti's Famous Hippo Gathering

A river bend full of hippos

Some Serengeti sightings are about patience and luck. Retima Hippo Pool is not one of them — it is about abundance. At a tight bend in the central Serengeti, where the Seronera River meets the Orangi, the water gathers into a deep, slow pool, and into that pool the hippos pack themselves flank to flank: a heaving, grunting, mud-slicked raft of bodies, sometimes a hundred or more, ears flicking, the occasional vast pink mouth yawning open in a threat display. It is comic and faintly prehistoric all at once, and it is one of the surest wildlife spectacles in the whole park.

Hippos spend their days submerged to escape the sun, because their skin burns and dries easily; they emerge at night to graze the surrounding grass, walking miles before returning to the water by dawn. Retima's deep, permanent pool is prime real estate, which is why so many gather here — and why the bend is rarely empty. For visitors it offers something the open plains rarely do: a guaranteed concentration of large wild animals you can settle in and watch at leisure.

At a glance

A quick orientation before you go — confirm current access and any closures with your guide or TANAPA, as river conditions and viewpoint rules can change.

• Where: central Serengeti, north of Seronera, where the Seronera and Orangi rivers meet.
• What: a permanent river pool holding dozens — often 100-plus — hippos year-round.
• Best time: dry season, when low water concentrates the animals; early or late for cooler light.
• Access: one of the few sites with a designated viewpoint where you may step out, rangers permitting.
• Pairs with: a central Seronera valley game drive — big cats and hippos in one outing.

Timing your visit

Retima is rewarding all year, but the dry season — roughly the middle of the year, though always treat seasonal timing as a long-term average and verify for your dates — concentrates the hippos most dramatically, as falling water levels squeeze them into the deepest pools. In the green season the river runs higher and the animals spread out a little more, but the pool still holds a crowd.

Within the day, the rhythm matters less for hippos than for cats — the animals are here around the clock — but the early morning and late afternoon bring softer light, cooler air and more activity on the bank, and avoid the harshest heat and glare off the water. Many travellers fold Retima into a morning Seronera circuit, arriving as the day warms. The hippos themselves are most animated when jostling for space or when a bull throws back its head to gape — a dominance display, not a yawn — so a little patience at the rail often pays off with a dramatic moment.

Safety, smells and stepping out

Retima is unusual in the Serengeti: it is one of a small number of sites with a designated viewpoint where, when conditions allow and rangers permit, you may leave the vehicle to watch from a safe, slightly elevated vantage above the pool. That access is a privilege, not a guarantee — it can be closed, and you must follow your guide's and any ranger's instructions to the letter. Never approach the water's edge. Hippos are statistically among Africa's most dangerous large animals, fiercely territorial in the water and capable of surprising speed on land, and the banks can hide crocodiles too.

Be ready for the smell. A hundred hippos in a stagnant pool produce a famously powerful aroma — a thick, earthy, unforgettable reek that visitors talk about almost as much as the sight. It is harmless and entirely part of the experience, but it does take newcomers by surprise. Keep voices low, keep children close and within arm's reach at the rail, do not throw anything into the pool, and resist the urge to lean out for a photograph. Watched sensibly from the viewpoint, Retima is one of the safest close-up wildlife encounters the park offers.

• Stay at the designated viewpoint and follow ranger and guide instructions; never approach the water.
• Hippos are highly dangerous and territorial — keep well back and keep children within arm's reach.
• Expect a very strong smell; it is harmless and part of the experience.
• No feeding, no throwing anything into the pool, no leaning out for photos.

Pairing Retima with a central game drive

Retima's great virtue is its location. It sits in the central Serengeti, within easy reach of the Seronera valley — the park's most reliable big-cat country, where rivers, kopjes and riverine figs hold lions, leopards and cheetahs year-round. That makes the hippo pool a natural anchor for a central game drive: a morning can comfortably string together a search for cats along the Seronera River, a stop at the kopjes, and a long, leisurely halt at Retima, all without long transfers. For families and first-time visitors based centrally, it is an ideal, high-reward, low-effort addition.

Because the central Serengeti is where most drive-in and many fly-in itineraries begin, Retima slots in without rerouting your trip. Build it into a Seronera circuit, treat it as the relaxed counterpoint to the tension of cat-tracking, and let the kids — or yourself — simply watch the hippos jostle and gape for as long as you like. It is the kind of unhurried, guaranteed-abundance stop that rounds out a day of more elusive sightings.