Wildlife watching in Serengeti

The Mara River crossings are the concentrated, dramatic heart of the largest land migration on earth. For a week in the northern Serengeti, timed to the herds, you watch upwards of a million wildebeest mass on the banks — sometimes for hours, sometimes all day — until something tips them and they surge into a river full of crocodiles in a chaos of dust, water and noise.

What makes it land is that nothing is scheduled. You wait, often long past the point of patience, and the waiting is exactly what gives the crossing its charge when it finally comes. Between times, the northern Serengeti delivers the rest of the great East African cast — lion, elephant, giraffe — from a vehicle, in some of the best game country in Africa.

Crossing timing shifts with the rains and can never be guaranteed, and the northern camps book a year ahead for the peak weeks of roughly August to October. Go for the spectacle, but go knowing it runs on the animals' clock, not yours.

The Mara River crossings are the concentrated, dramatic heart of the largest land migration on earth.

For a week in the northern Serengeti, timed to the herds, you watch upwards of a million wildebeest mass on the banks — sometimes for hours, sometimes all day — until something tips them and they surge into a river full of crocodiles in a chaos of dust, water and noise.

Nothing is scheduled, and the waiting, often long past the point of patience, is exactly what gives the crossing its charge when it finally comes. Between times, the northern plains deliver the rest of the great East African cast — lion, elephant, giraffe — from a vehicle.

Book a mobile-camp safari in the northern Serengeti a year ahead for the peak crossing weeks, roughly August to October — the good camps fill that far out.

Go with the understanding that crossing timing shifts with the rains and can never be guaranteed; you are buying the chance, not a schedule. A guide and vehicle are part of every trip, and no special skill is needed, so it suits families from around six.

Time your week to the herds' position, which your operator tracks. Bring binoculars, a long lens if you have one, and patience — the spectacle runs on the animals' clock, not yours.