Serengeti Wildebeest Migration Routes — Full Year Map Explained

The Great Migration is often described as a circular loop. This is accurate but simplified. The actual movement of the wildebeest is driven by rainfall and grass quality — and it follows a broadly predictable annual pattern across three distinct ecosystems: the Ndutu plains in the south, the Serengeti central and western zones, and the northern Serengeti bordering Kenya's Masai Mara.

The Ecosystem

The migration happens within what ecologists call the Serengeti-Mara ecosystem — approximately 40,000 square kilometres spanning Tanzania's Serengeti National Park, the Ngorongoro Conservation Area's short-grass plains, and Kenya's Masai Mara National Reserve. The wildebeest do not recognise the international border.

The herds involved: approximately 1.5 million wildebeest, 400,000 Thomson's gazelles, and 200,000 zebras. They move together but not identically — zebras often lead, eating coarser grasses first. Wildebeest follow, feeding on shorter growth. Gazelles pick the finest shoots last.

What Drives the Migration

The movement tracks rainfall. Wildebeest can smell rain up to 50 kilometres away. They follow the rains because rain produces the grass they need. The annual circuit is consistent because the rainfall patterns of the Serengeti ecosystem are consistent: the short-grass plains receive rain from November through May; the northern Serengeti and Mara receive rain from April through October with a long dry season in between.

The Annual Route: Month by Month

November to January — Southern Serengeti and Ndutu

The short rains fall on the short-grass plains of southern Serengeti and the Ngorongoro Conservation Area. The herds converge here following the rains. By late November, large concentrations are forming on the Ndutu plains. By January, the herds are settled and the first calves begin appearing.

Where to be: Ndutu, Lake Masek area, southern Serengeti short-grass plains.

January to March — Calving Season, Ndutu

Calving peaks in February — up to 8,000 calves born per day across the Ndutu plains. Predator density during this period is extraordinary. Lions, cheetahs, leopards, wild dogs, hyenas, and jackals all concentrate around the calving herds. This is the most underbooked phase of the migration despite offering exceptional wildlife density. Read the full Ndutu calving season guide.

April to May — Western Corridor and Long Rains

By late March, the Ndutu plains dry out. The herds move northwest through central Serengeti toward the western corridor. April and May coincide with the long rains. Game viewing can be excellent but roads in some areas become challenging. This is the lowest visitor season, with significant price reductions.

June — Grumeti River Crossings

The first major river crossing event of the year. The Grumeti River cuts across the western corridor, and the wildebeest must cross it to continue north. The Grumeti has a reputation for large Nile crocodiles — some of the biggest in Africa. Less famous than the Mara River crossings but produces dramatic sightings with significantly fewer tourist vehicles.

July to October — Northern Serengeti and Mara River Crossings

The most photographed phase. From July onward, the herds push north through the Serengeti and into Kenya's Masai Mara, crossing the Mara River in scenes that have defined the popular image of the migration. Mara River crossings happen repeatedly from July through October — the herds cross, return, and cross again following grass availability on either side.

• July–August: Herds building in the northern Serengeti. Crossings beginning.
• September: Peak crossing season. Highest chance of seeing crossings.
• October: Herds beginning to return south as Mara grasses dry.

Where to be: Northern Serengeti — Kogatende, Lamai Wedge, the Mara River corridor. Book 6-12 months ahead for peak July-September dates.

November — Return South

The short rains begin again. The herds sense rain on the southern plains and begin the return journey south toward Ndutu. The circle restarts.

What This Means for Planning

• River crossings: July–October, northern Serengeti.
• Calving and predator intensity: January–March, Ndutu.
• Herds with fewer tourists: February or November.
• Grumeti crossings with very few vehicles: June, western corridor.

Migration Statistics That Put It in Context

The Great Migration is the largest remaining land mammal migration in the world. Understanding the numbers helps frame what you are actually witnessing on a safari.

The wildebeest population involved is approximately 1.5 million individuals. This sounds abstract until you see the herds stretching from horizon to horizon, at which point the number becomes viscerally comprehensible. The population collapsed in the 1890s due to rinderpest — a viral disease introduced by European livestock — and recovered over the following century as vaccination programmes eliminated the disease from cattle. The current population is considered robust but faces ongoing pressure from habitat loss, drought, and illegal hunting in border areas.

The zebras travel alongside the wildebeest in numbers of approximately 200,000 to 300,000. Unlike wildebeest, zebra numbers are considered stable and in some areas increasing. Zebras and wildebeest coexist without competition because they eat different parts of the same grasses — zebras strip the taller, coarser growth first, and wildebeest follow behind, eating the shorter regrowth. The relationship is mutually beneficial and is one of the clearest examples of ecological mutualism in large mammal systems.

Calving mortality is high by design. Of the approximately 400,000 to 500,000 calves born during the February calving season, approximately 40-50% do not survive their first three months. This is not unusual for a prey species — it is the biological engine that feeds the predator population. The calves born in the first week of February are vulnerable to predation, and lions, hyenas, cheetahs, wild dogs, and jackals all concentrate on the calving herds. The survival rate is enough to sustain the population at current levels in normal rainfall years. In severe drought years, the mortality rate climbs significantly.

The Predators That Follow the Migration

The migration is not just about the herbivores. The movement of the herds attracts and concentrates predators in ways that make certain periods exceptionally rewarding for big cat sightings.

Lion prides follow the herds, particularly in the western corridor and northern Serengeti where the migration passes through their established territories. The lion population in the Serengeti is one of the most studied in the world — researchers have monitored individual animals since the 1960s. The pride structure is fluid, but several prides in the western corridor and around the Mara River have overlapping ranges with the migration herds and are reliably seen when the herds are present. Male lions defending territory against other males is one of the most dramatic sightings available during the July-to-October period.

Cheetahs follow the gazelle herds rather than the wildebeest specifically, but the migration creates exceptional cheetah density on the southern and southeastern Serengeti plains from November through March. The open short-grass plains of the Ndutu area are ideal cheetah habitat, and the concentration of Thomson's and gazelles during calving season attracts a disproportionate number of cheetah mothers with cubs. March and April are considered particularly good months for cheetah sightings in this area, with lower visitor numbers and high cheetah activity.

African wild dogs den in the northern Serengeti from approximately June through October, following the migration north. Their range overlaps significantly with the wildebeest at this time, and sightings of wild dog packs of 20-30 individuals are possible in the Lamai Wedge and Kogatende areas. Wild dog are endangered — Tanzania holds one of the largest remaining populations — and sighting them is never guaranteed, but July through October is the most reliable window in the Serengeti ecosystem.

Photography Tips for the Migration

Photographing the Great Migration requires different preparation from standard wildlife photography. The subjects are more predictable in location but the conditions — river crossings, crowded viewing positions, dust and spray — require specific technical approaches.

For river crossings, a fast shutter speed is non-negotiable. 1/1000th of a second or faster freezes the action of a wildebeest mid-leap into the Mara River. The crossings happen quickly — a herd of thousands makes its decision and crosses within minutes — and the action is chaotic. Shoot in burst mode with a fast card. A 70-200mm zoom covers most crossing shots, though a 300mm or 400mm prime is useful when you are positioned further back from the riverbank.

For calving season photography, a longer lens (400mm or 600mm) is more useful than a wide angle. The action is intimate — cheetahs taking down calves, lionesses stalking through the grass — and the Ndutu landscape does not require wide framing. The intimate wildlife moments of calving season are better captured with reach than with breadth.

Most critically: the migration is not a zoo. You cannot guarantee a crossing shot. Some visitors spend three days at the Mara River without witnessing a crossing. Others arrive and see one within an hour. The only guarantee is that the herds are in the area — what happens on any given day is entirely between the animals and the river. An experienced guide who knows the herd movements and crossing points improves your probability, but nothing makes it certain. Safaris Tanzania guides based in the northern Serengeti track the herds daily and know which crossing points are active — this real-time knowledge is the practical value of a ground operator with decades of presence in the ecosystem.

Planning Your Migration Safari

The migration is always happening — there is no month when the herds are absent from the Serengeti ecosystem. But the experience is so different depending on where the herds are that planning around the specific phase matters more than any other single factor in Tanzania safari planning.

The camps and lodges that are positioned for each phase are different. A camp in the Ndutu area that is spectacular in February is irrelevant in August. A northern Serengeti camp positioned for Mara River crossings cannot offer much in November. The best itinerary places you in the right area for your dates, not just the right park for any dates.

ReadTime availability for the northern Serengeti camps during July through October is the earliest-to-book window in all of Tanzania. The best properties — the Klein's Camp, Ubuntu Camp, and Lamai Serengeti in the north — fill 12 to 18 months ahead for peak migration season. If you are planning a July-September northern Serengeti visit, start the conversation at least a year in advance. Safaris Tanzania handles these bookings directly with the camps — we do not use resellers, which means better availability and no markup on camp bookings.

Start planning your migration safari now. WhatsApp Kassim at +255 786 110 786 with your travel month and group size and we will tell you what is realistically achievable for your window and what you need to book immediately to secure the best positions.