The Great Migration is a year-round natural phenomenon in Kenya, involving millions of herbivores, such as wildebeest, zebras, elands, and gazelles, traveling between the Serengeti National Park in Tanzania and the Masai Mara National Reserve in Kenya. This migration is driven by the need for fresh grass and water, with the animals constantly moving in search of better grazing areas. The movement is largely influenced by the region's weather patterns and the alternating rainy and dry seasons, which create the perfect conditions for this remarkable journey.

The best time to witness the Great Migration is from July to October, especially during the dramatic river crossings. These crossings, most notably at the Mara River, occur from late July to August and sometimes extend into September. During this time, the sight of vast herds of animals struggling to cross the river, often while evading predators like crocodiles, lions, and leopards, is truly breathtaking. The river crossings are not only dangerous but also chaotic, making them one of the most thrilling events in the migration.

The Great Migration plays a vital role in maintaining the health of the ecosystem. As the animals move, they fertilize the soil with their droppings, which enhances the grazing lands for future generations of wildlife. The Masai Mara National Reserve is a popular location to witness this event, though it can become crowded during peak months. Recognized as one of the seven natural wonders of the world, the Great Migration is an iconic safari experience that should not be missed.