It is a common misnomer that the Great Migration only happens now, in August. It is a year round event when thousands of wildebeest are on the move and each month of the year offers visitors a unique wildlife experience.  At the beginning of the year, the herds calve and stay in the Southern Serengeti before they march north around April arriving in the Western Corridor sometime in June. The crossings, at the Grumeti and the Mara Rivers, take place towards the end of July onwards and after a couple of months on the Mara plains, the herds start to trek south again around the end of October, at the peak of the dry season. They make their way south through Loliondo towards the Southern Plains for the whole cycle to begin again.