The Great Migration: The World’s Largest Wildlife Movement Through Kenya and Tanzania
The Great Migration moves 1.5 million blue wildebeest and 200,000 zebras 1,800 miles annually through the Serengeti–Mara ecosystem. Mara River crossings (July–October) represent the migration’s climax, concentrating Nile crocodiles, lion prides, and crossing herds at a single river point.
Great Migration Month-by-Month Route
| Month | Location | Key Event | Best Viewed From |
|---|---|---|---|
| Jan–Mar | Southern Serengeti, Tanzania | Calving season — 500,000 calves born | Ndutu area lodges |
| Apr–May | Central Serengeti | Northward movement begins | Seronera camps |
| Jun–Jul | Western corridor, Grumeti | Grumeti River crossings | Grumeti Reserve camps |
| Aug–Sep | Masai Mara, Kenya | Mara River crossings — peak | Mara conservancy lodges |
| Oct–Nov | Return south begins | Wildebeest re-enter Tanzania | Mara Triangle camps |
| Dec | Southern Serengeti | Pre-calving assembly | Ndutu, Loliondo camps |
What Makes the Mara River Crossings the Migration’s Climax?
Mara River crossings concentrate 1,000–10,000 wildebeest at a single point. Nile crocodiles (up to 5m, 600kg) station in pools downstream. Lion prides position on embankments anticipating weakened stragglers.
- 40–80 crossings occur across a single August–September season
- Best crossing points: Serena Crossing (Mara Triangle), Lookout Hill, Sand River
- Calving season (January–March) attracts cheetah, lion, and hyena in southern Serengeti
Secure migration-timed safari packages via Expedia Kenya Migration Safari, book Mara River camp lodges via Booking.com Masai Mara, or compare on Kayak Masai Mara.
Frequently Asked Questions
Can you predict exactly when a Mara River crossing will happen?
Crossing timing cannot be predicted — herds respond to instinct triggers varying by hours or days. Full-day riverside commitment produces the highest encounter probability.
What is the best month for the Great Migration in Kenya?
August and September deliver the highest frequency of Mara River crossings. July offers first crossings with lower crowd levels. October sees the return south.