The Savuti Marsh area, 10,878 km2 (4,200 sq mi) large, constitutes the western stretch of the park (50 km (31 mi) north of Mababe Gate). The Savuti Marsh is the relic of a large inland lake whose water supply was cut a long time ago by tectonic movements. Nowadays the marsh is fed by the erratic Savuti Channel, which dries up for long periods then curiously flows again, a consequence of tectonic activity in the area. 

As a result of this variable flow, there are hundred of dead trees along the channel's bank. The region is also covered with extensive savannahs and rolling grasslands, which makes wildlife particularly dynamic in this section of the park. During dry seasons, tourists going on a safari often sight rhinoceros (both black and white), warthog, kudu, impala, zebra, wildebeest and a herd of elephants. During rain seasons, the rich birdlife of the park, 450 species in the whole park, is well represented. Prides of lions, hyenas, zebras or more rarely cheetahs are sighted as well. This region is reputed for its annual migration of zebras and predators.