The Great Migration is widely considered the greatest wildlife spectacle on Earth. Over 1.5 million wildebeest, 500,000 zebra, and 200,000 gazelle move in a continuous, year-round cycle across the Serengeti-Mara ecosystem, driven by the ancient instinct to follow the rains and fresh grass.
While the migration is constant, the river crossings are the dramatic highlight. Watching thousands of animals plunge into crocodile-infested rivers, hooves thundering, dust rising, and the survival instinct raw and visible — this is the moment every safari traveller dreams of.
This guide tells you everything you need to know: where the herds are each month, when and where the river crossings happen, which camps offer the best access, and how to maximise your chance of witnessing this awe-inspiring event.
Quick answer: The most dramatic river crossings happen July through September in the northern Serengeti (Mara River). The Grumeti River crossings in the western Serengeti occur from June to July. For the best experience, plan to stay 3–5 nights in the crossing area and book 8–12 months in advance.
The Great Migration by the Numbers
The sheer scale of the Great Migration is almost impossible to comprehend until you see it. Here is what we are talking about:
The Year-Round Migration Cycle
The Great Migration is not a single event with a start and finish. It is a continuous, circular movement driven by rainfall patterns. Understanding where the herds are each month is key to planning your trip:
Southern Serengeti & Ndutu
Calving season. The herds concentrate on the short grass plains of the southern Serengeti and Ngorongoro Conservation Area. Around 8,000 wildebeest calves are born daily. This is the best time for predator action — lions, cheetahs, and hyenas feast on vulnerable newborns.
Southern SerengetiMoving North-West Through Central Serengeti
The herds begin their migration north-west as the southern plains dry out. They spread across the central Serengeti (Seronera area) and begin heading toward the western corridor. The long rains arrive in April, making landscapes lush and green.
Central / Western SerengetiWestern Serengeti (Grumeti Area)
The herds reach the western Serengeti and the Grumeti River. This is the first major river crossing challenge. The Grumeti has large crocodiles, though the crossings here are less dramatic than the Mara. By late June, the herds push north toward the Mara River.
Western SerengetiNorthern Serengeti (Mara River)
The most famous phase. The herds gather on the banks of the Mara River in the northern Serengeti. The river crossings are the most dramatic — wildebeest plunge into crocodile-filled waters, creating chaos and spectacle. This is the peak season for migration viewing.
Northern SerengetiMoving East and South
As the short rains begin, the herds start their journey south through the eastern Serengeti (Lobo area). They move quickly, following the fresh grass. By November, they are back on the southern plains.
Eastern SerengetiReturn to Southern Serengeti
The herds arrive back on the southern short grass plains. Calving begins toward the end of the month, and the cycle starts again. The landscape is green from the short rains, and bird watching is excellent.
Southern SerengetiImportant: The migration is driven by rainfall, which varies from year to year. The timing of river crossings can shift by 2–4 weeks depending on weather patterns. Your guide and camp manager will have the most up-to-date information on herd movements during your visit.
The River Crossings: Where the Magic Happens
There are two major river crossing points in the Serengeti, each offering a different experience:
Grumeti River Crossings
The Grumeti River flows through the western corridor of the Serengeti. The crossings here are less famous than the Mara but still spectacular. The river is wider and slower-moving than the Mara, with large Nile crocodiles lurking in the murky waters.
What to Expect
- Timing: Late May through July, peaking in June
- Crocodile size: Grumeti crocodiles are among the largest in Africa — some exceed 5 metres
- Crowds: Significantly fewer vehicles than the Mara crossings
- Landscape: Riverine forest and open woodland, beautiful scenery
- Accommodation: Excellent camps in the western Serengeti (Grumeti, Singita, Kirawira areas)
Why Choose Grumeti
Fewer tourists, larger crocodiles, and a more intimate experience. If you prefer quality over crowd-size, the Grumeti crossings are an excellent choice. The western Serengeti also offers exceptional year-round wildlife viewing even when the migration is not present.
Mara River Crossings
The Mara River is the most famous crossing point of the Great Migration. The river is narrower, deeper, and faster-flowing than the Grumeti, creating more dramatic crossings. The banks are steep, and the wildebeest must commit completely once they begin crossing.
What to Expect
- Timing: July through October, peaking in August and September
- Crocodile size: Large crocodiles but generally smaller than Grumeti
- Crowds: Busiest area during peak season — expect multiple vehicles
- Drama factor: Highest — steep banks, fast water, mass panic
- Photography: Best opportunities with steep banks providing elevated viewpoints
- Accommodation: Premium camps in the Kogatende, Lamai, and Mara River areas
Why Choose Mara
This is the iconic migration experience. The Mara River crossings are the most dramatic, most photographed, and most likely to produce the heart-stopping wildlife moments you have seen in documentaries. Despite the crowds, the experience is unforgettable.
Important note on timing: River crossings are not guaranteed on any specific day. The herds gather on the banks and can wait hours or even days before crossing. Patience is essential. Plan to stay 3–5 nights in the crossing area to maximise your chances. Even during peak season, there can be gaps of several days between crossings.
Monthly Migration Calendar
Here is exactly where the herds are each month, with crossing probability ratings:
Where to Stay for the Best Crossing Views
Choosing the right camp can make the difference between seeing a crossing or missing it entirely. Here are our top recommendations by area:
Northern Serengeti (Mara River Area)
For the Mara River crossings, stay in the Kogatende or Lamai areas. These are the closest to the main crossing points:
Mara River Camp
Located right on the Mara River within walking distance of crossing points. Comfortable tents with river views.
Lamai Serengeti
Perched on a hill overlooking the Mara River. Excellent views of the crossing points. Luxury tents.
Sayari Camp
Top-rated luxury camp close to the Mara River. Known for expert guides who know the crossing patterns.
Serengeti Migration Camp
Permanent luxury camp set among rocky kopjes with stunning views. Excellent guiding.
Western Serengeti (Grumeti River Area)
For a quieter crossing experience with fewer vehicles:
Grumeti Serengeti Camp
Located in a private reserve adjacent to the Serengeti. Excellent access to Grumeti River crossing points.
Kirawira Camp
Luxury tented camp in the western corridor. Known for exceptional service and knowledgeable guides.
Mbalageti Serengeti
Permanent camp with panoramic views of the plains. Good year-round wildlife viewing.
Singita Sasakwa
Ultra-luxury lodge on a hilltop. Private game-viewing vehicles and expert guides. Exceptional experience.
Pro Tip: Stay 3–5 Nights
River crossings are unpredictable. Even during peak season, herds may wait days before crossing. We recommend a minimum of 3 nights in the crossing area, ideally 4–5 nights to maximise your chances. Many travellers combine 3 nights in the north (Mara) with 2–3 nights in the west (Grumeti) for a comprehensive migration experience.
Tips for Maximising Your Crossing Experience
Seeing a river crossing requires patience, strategy, and a bit of luck. Here is how to tilt the odds in your favour:
Arrive Early, Stay Late
Crossings can happen at any time of day, but early morning (6:00–9:00 AM) and late afternoon (4:00–6:30 PM) are most common. Be on the river before sunrise and do not leave until sunset. The most patient travellers are rewarded.
Listen to Your Guide
Experienced guides track the herds daily and communicate with other guides via radio. Trust their expertise. They often know where the herds are gathering and can position you in the best spot before the crossing begins.
Be Patient — Really Patient
The herds may gather on the riverbank for hours, testing the water, backing away, gathering again. This tense waiting period is part of the experience. A crossing can happen in an instant after hours of waiting. Do not give up.
Position Strategically
Position your vehicle slightly downstream from where the herds are gathering. Wildebeest often drift downstream during the crossing. Also consider the sun angle — you want the light behind you for photography.
Bring the Right Gear
Binoculars are essential. A camera with a telephoto lens (200–400mm minimum) is highly recommended. Bring dust masks (the dust from moving herds can be intense), plenty of water, snacks, and a fully charged power bank.
Consider a Private Vehicle
During peak season, crossing points can have 20–40 vehicles waiting. A private vehicle gives you more flexibility to move to different crossing points and avoid the crowds. Our private safaris include exclusive-use vehicles.
Photographing the River Crossings
Capturing the river crossings on camera is challenging but incredibly rewarding. Here are our top photography tips:
Camera Settings
Use shutter priority (Tv) mode with a minimum shutter speed of 1/1000s to freeze the action. Set your aperture to f/5.6–f/8 for a good depth of field that keeps the herd sharp. Auto ISO with a maximum of 6400 works well in changing light.
Lens Choice
A 100–400mm or 200–500mm telephoto zoom is ideal. You need reach to capture the crossing from a safe distance, but also the flexibility to zoom out when the action comes close. A beanbag on the vehicle window is essential for stability.
Composition Tips
Include some of the riverbank or surrounding landscape to give context to the crossing. Capture the dust, the splashing water, the crocodiles waiting in the shallows. Burst mode (continuous shooting) is your friend — the decisive moment lasts only a second.
Photography tip: Position yourself with the sun behind you for the best light. Morning light (6:00–9:00 AM) is golden and beautiful. Late afternoon (4:00–6:30 PM) offers warm, dramatic light. Midday sun creates harsh shadows — if a crossing happens at midday, focus on the action rather than perfect light.
Frequently Asked Questions
The Mara River crossings peak in August and September, though crossings can occur from July through October. The Grumeti River crossings peak in June and July. For the highest probability, plan a 3–5 night stay in the northern Serengeti between mid-July and late September. Keep in mind that the migration is driven by rainfall, so timing can vary slightly from year to year.
No, river crossings are never guaranteed. The herds may cross multiple times in a day, or they may wait on the banks for days before crossing. Even during peak season, there can be quiet periods. This unpredictability is part of what makes witnessing a crossing so special. We recommend staying 3–5 nights in the crossing area to maximise your chances, and choosing a flexible itinerary that allows your guide to follow the herds.
During peak season (August and September), there can be 20–40 vehicles at popular crossing points. The Mara River crossing area is a relatively narrow stretch, so crowds are inevitable. However, experienced guides know alternative crossing points that are less frequented. For a quieter experience, consider the Grumeti River crossings (June–July) or visit in late September/early October when crowds thin.
Yes, the migration is happening every single day of the year. The herds are always somewhere in the Serengeti-Mara ecosystem. The question is not whether you will see the migration, but where in their cycle you will see them. From January to March they are in the south for calving. April to June they move through the central and western Serengeti. July to October they are in the north for the river crossings. November to December they return south.
For peak season (July–October), book 8–12 months in advance. The best camps in the northern Serengeti fill up quickly, often a year ahead. For the calving season (January–March), 4–6 months ahead is usually sufficient. For green season (April–May), 2–3 months is often fine. We recommend booking as early as possible to secure your preferred camp and dates.
The Great Migration spans both Tanzania and Kenya. The herds spend most of the year (approximately 9 months) in Tanzania’s Serengeti National Park. From August to October, some herds cross the Mara River into Kenya’s Maasai Mara National Reserve before returning south. For the best overall experience, we recommend staying on the Tanzanian side, where the crossing areas are less crowded and the viewing is exceptional.
The migration brings the entire Serengeti ecosystem to life. You will see lions, leopards, cheetahs, hyenas, crocodiles, hippos, elephants, giraffes, zebras, gazelles, elands, topis, and hundreds of bird species. The predators follow the herds, so wherever the migration is, the big cats are not far behind. The river crossings attract huge Nile crocodiles that wait for the herds.
The Mara River crossings (northern Serengeti, July–October) are the most dramatic — steep banks, fast-flowing water, mass panic, and the highest concentration of vehicles. The Grumeti River crossings (western Serengeti, June–July) are less crowded, have larger crocodiles, and offer a more intimate experience. The Grumeti is wider and slower-moving, making the crossings less frantic but equally fascinating. Many travellers do both if time allows.
For a migration-focused safari, pack: neutral-coloured clothing (khaki, olive, beige), a warm fleece for cold mornings, a lightweight waterproof jacket, comfortable walking shoes, a wide-brimmed hat, polarised sunglasses, sunscreen, insect repellent, binoculars (essential), a camera with a telephoto lens (200–400mm+), extra memory cards and batteries, a power bank, and a reusable water bottle. See our Ultimate Safari Packing Guide for a full checklist.