The Gol Mountains (Oldoinyo Gol in Maasai) are located at the north-end of the Ngorongoro Conservation Area and is an example of a fault-bounded mountain range. They rise from the open short grass plains that attract migratory wild animals and predators, to a height of 915 m above its base. Continuous faulting lowered the rocks to the east, leaving the rocks to the west to form the mountains. The Gol Mountains, the rocks consist of highly-fractured metamorphic quartzite, virtually identical to that seen in the Soitoo Hills. 

The area is teeming with wildlife during the rainy season, from March to June, as opposed to the dry months, when the vegetation turns dusty brown. 

The dusts blown by volcano eruptions landed on these plains, showcasing the area’s uniqueness during the rainy season, when the plains are most fertile with very nutritious pasture, attracting large concentrations of migratory animals such as wildebeest, zebra, and gazelle. 

The Sale Plains are situated near the Gol Mountains.