The Great Wildebeest Migration, one of the most spectacular wildlife events in the world, is a continuous cycle of movement that involves the constant search for fresh grazing and water by millions of wildebeests, zebras, and other herbivores. The migration doesn't have a fixed endpoint but rather follows a circular route between Kenya's Maasai Mara Reserve and Tanzania's Serengeti National Park.

Here's how the migration's cycle typically progresses:

Serengeti Plains, Tanzania (December to March): The migration begins in the southern Serengeti and the Ndutu area during the calving season, which usually occurs from December to March. This is when wildebeests give birth to their young, and predators are abundant.

Central Serengeti, Tanzania (April to May): As the rains come to an end, the herds start moving northward through the central Serengeti.

Western Serengeti, Tanzania (June to July): By June, the herds reach the western Serengeti, and they often cross the Grumeti River during this period. River crossings can be dramatic as they face crocodiles and other predators.

Maasai Mara Reserve, Kenya (July to October): In July or August, the herds enter Kenya's Maasai Mara Reserve, and this is often considered the peak of the migration in terms of sheer numbers. River crossings, particularly at the Mara River, are a highlight of this period.

Return to Tanzania (November): As the dry season sets in and food and water sources in the Maasai Mara diminish, the herds begin their journey back south into Tanzania, often starting in November. This marks the end of the northern leg of the migration.

The Great Migration is a continuous and cyclical event, with the herds continually moving in search of food and water, so it doesn't have a fixed endpoint. Instead, it follows a perpetual loop between the Serengeti in Tanzania and the Maasai Mara in Kenya. The specific timing and locations of the migration can vary from year to year based on rainfall patterns, and the herds' movements are driven by their natural instincts and the availability of resources.