The Ngong Hills are peaks in a ridge along the Great Rift Valley, located southwest near Nairobi, in southern Kenya. The word "Ngong" is an Anglicization of a Maasai phrase "enkong'u emuny" meaning rhinoceros spring, and this name derives from a spring located near Ngong Town. 
The Ngong Hills, from the eastside slopes, overlook the Nairobi National Park and, off to the north, the city of Nairobi. The Ngong Hills, from the westside slopes, overlook the Great Rift Valley dropping over 1000 metres (4,000 feet) below, where Maasai villages have been developed.
The peak of the Ngong Hills is at 2460 meters (8070 feet) above sea level. 
In the 1985 film Out of Africa, the four peaks of the Ngong Hills appear in the background of several scenes near Karen Blixen's house. Local residents still reported seeing lions in the Hills during the 1990s.
The solitary grave of Denys Finch Hatton, marked by an obelisk and garden, is located on the eastern slopes of the Ngong Hills, overlooking the Nairobi National Park.
There is a walking trail along the tops of the Ngong Hills. Kenya Forestry Service has a small post at the NE foot of the park. There is a KSH 600 fee for visitors. Local residents have sometimes held Sunday church services on the southern peak, overlooking the Great Rift Valley.
Near the hills is the town of Ngong. A wind farm is being built on the hills.  There is an active wind farm now on the northern hills. Many hikers have reported being robbed or mugged on the southern hills over the last few years. Kenya Forestry Service offers guides/security to accompany you on your hike for an extra fee (KSH 1500).
Bruce MacKenzie, Minister of Agriculture in Kenya, was killed when a time bomb attached to his plane exploded as it flew above Ngong Hills in a flight from Entebbe, Uganda on May 24, 1978, after Ugandan President Idi Amin ordered Ugandan agents to assassinate MacKenzie/
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- Photo of Ngong Hills from game reserve: showing entire ridge, with Rift Valley behind [Kijabe.org].
- Photos of Ngong area and from top of Ngong Hills.
- Photo of Ngong Hills from Blixen lawn: showing yard left of Karen Blixen house, with Ngong Hills behind [from AAA-Calif.com].
- Photo of Ngong Hills from Great Rift Valley: showing severe drop, with Nairobi suburbs on opposite side [PBase.com].
- Photo of Ngong Hills from Great Rift Valley, closeup: showing vegetation, Nairobi suburbs on opposite side [PBase.com].
- Photo of Ngong Hills from Great Rift Valley, closeup: showing vegetation, suburbs [full webpage from PBase.com].