The Mara only holds the migration for part of the year, and it is worth being precise about that before you book flights.

The herds are typically in Kenya’s Maasai Mara from around July through October, having crossed north from Tanzania’s Serengeti in search of fresh grass. River crossings at the Mara or Talek rivers, the dramatic images most people have in mind, cluster most reliably from late July through September, though nothing about wild animal movement is guaranteed on a fixed date.

August and September are peak months for crossings and also peak season for visitors, so expect higher park fees, busier crossing points and lodges booked out well in advance if you want a good camp near the action.

Outside that window, the Mara itself is quieter but still has excellent resident wildlife, big cats especially, and lower prices. If you specifically want the migration, do not book a Mara-only trip for December through June, as the herds are down in the Serengeti during that period, not in Kenya at all.

If your dates are flexible, late July and early October often give a good balance: the herds are usually present, crowds are slightly lower than peak August, and rates are a touch more reasonable.

Nobody can promise a crossing on any single day, even in peak season. Budget several days in the Mara rather than one if seeing a crossing matters to you, and build in patience. It is genuinely one of the best wildlife spectacles on the continent when it comes together.