April – June: During April and May the migration moves away from the depleted short-grass plains of the southern Serengeti and heads north to the long-grass plains of the Serengeti’s western Corridor, almost to Lake Victoria. This period marks the long rainy season and the migration moves west as they graze the plains of the Serengeti. By the end of May the migration has exhausted the Western Corridor’s best pastures and the herds start to move north, where mating begins to take place mid June.
July – November: Around July or August the migration starts to cross the Mara River and this constitutes for spectacular river crossings. Sometimes the crossing place they have chosen is shallow allowing for the majority of animals to pass safely. In other areas the waters boil with drowning wildebeest and slashing crocodiles. The migration resides in the Masai Mara until October before the arrival of the short rains in the southern Serengeti call the migration southwards. As November ends the migration is making its way back to the southern Serengeti and early in the year they once again give birth. The circle of life is complete. The best time to see the migration is between June and August when the wildebeest prepare to cross the famous Grumeti River and head into the Masai Mara.