Over 1.5 million wildebeest. Hundreds of zebra. Crocodiles. The Great Migration is the largest wildlife movement on Earth - here's how to see it at its best.
What Is the Great Migration?
The Great Migration is the year-round movement of approximately 1.5 million wildebeest, 400,000 zebra and 200,000 gazelle across a 1,800km circular route spanning Tanzania's Serengeti and Kenya's Masai Mara. It is driven entirely by rainfall and the availability of fresh grass - the herds follow the rains in a perpetual clockwise loop.
There is no single "start" or "end" to the migration. It is a continuous cycle, and which part you witness depends entirely on when you visit.
Month-by-Month: Where the Herds Are
January - February: Calving Season (Southern Serengeti / Ndutu)
The short rains of November - December have fertilized the short-grass plains of Ndutu and the Ngorongoro Conservation Area. This is where the wildebeest give birth - approximately 8,000 calves are born every day for a three-week period in February. The spectacle of mass calving draws predators in enormous numbers: lion, cheetah, hyena, wild dog and jackal all converge on the plains.
This is arguably the most dramatic period of the entire migration cycle, and it's significantly less crowded than the Mara River crossings in high season.
March - May: Moving North (Central Serengeti)
As the rains end and the southern plains dry, the herds begin moving north and west. The central Serengeti - Seronera valley - is excellent for year-round wildlife, and this transitional period offers good game viewing as predators follow the moving columns of wildebeest.
June - July: Western Corridor (Grumeti River)
The herds push through the western corridor and must cross the Grumeti River - home to enormous crocodiles. The Grumeti crossings are less dramatic and less well-known than the Mara, but can be spectacular. Crowds are lower and game viewing is excellent.
July - October: The Mara River Crossings (Northern Serengeti)
This is the moment most people picture when they think of the Great Migration. The herds have reached the northern Serengeti and must cross the crocodile-filled Mara River multiple times as they push into Kenya's Masai Mara and then return. Crossings are unpredictable - the wildebeest can mass at the riverbank for hours or days before a trigger individual leads the stampede across.
July - August is the peak season. Expect more vehicles at crossing points, but the wildlife spectacle is genuinely extraordinary. September - October offers similar wildlife with slightly lower crowds.
November - December: Return South
The short rains arrive and the herds begin their return journey south. The Serengeti is green and beautiful. This is a shoulder season with lower costs and fewer tourists, though the migration is dispersed across a wide area.
How to Plan Your Safari Around the Migration
The single most important piece of advice: spend at least 3 nights in the relevant zone. River crossings are not guaranteed on any given day. The animals are wild - they do not perform on schedule. Safari operators who promise you a crossing on day two of a one-night stay are overpromising. Position yourself correctly and stay long enough to maximise your chances.
Northern Circuit vs Ndutu - Which Is Better?
Neither is categorically better - they are completely different experiences. The Mara River crossings (July - October, northern Serengeti) are chaotic, violent and extraordinary - the sound and smell of a thousand wildebeest forcing themselves into crocodile-infested water is unlike anything else in nature. The calving season (January - February, Ndutu) is more peaceful but equally powerful: tiny calves staggering upright minutes after birth while cheetahs circle the periphery.
If you can only visit once, decide based on when you can travel. Both are world-class wildlife experiences.
Expert guide at Mashuba Tours, sharing knowledge directly from the mountain and the field.