This 6-day, 5-night safari from Arusha takes you through Lake Manyara National Park, Ngorongoro Crater, and the western Serengeti. The western corridor is the route the wildebeest take on their way north and is quieter than the central Serengeti, with Grumeti River crossings as a highlight in the migration months. Along the way, enjoy game drives in some of Tanzania's best wildlife areas and stay in comfortable lodges. The herds move through the year, and crossings at the Grumeti River are usually seen from about June to July, though sightings are never guaranteed.