Down the escarpment from Nairobi and north along the floor of the Rift Valley — a volcano you climb into, the geothermal field that supplies more of Kenya's electricity than anything else, four lakes with nothing in common but the fault line they sit in — then over the western wall into running country, the last rainforest in Kenya, Lake Victoria, and the Maasai Mara approached from the wrong side.
Nairobi
Arrive, sort the SIM card and the vehicle, and give the day to the city rather than driving out of it. Nairobi National Park starts seven kilometres from the central business district — fenced on three sides and left open at the south so the plains game can still move out towards Kitengela, which is why there is a running argument about every road and pipeline proposed across that gap. Go at opening if you go. Otherwise the Nairobi National Museum and the Railway Museum, which holds the rolling stock of the line this entire route runs parallel to.
Over the edge, and up Longonot
The old road to Naivasha drops off the eastern wall of the Rift at Mai Mahiu and the whole valley opens at once. Longonot gate is at the bottom. The climb to the crater rim takes about an hour and a half on loose ash, and the full circuit of the rim another two and a half — 2,776 metres at the high point, with a forested crater floor several hundred metres below you the whole way round. Carry all your water.
Hell's Gate and Olkaria
The one Kenyan national park you may ride a bicycle through, because the large predators are effectively absent. Hire a bike at Elsa Gate and ride the valley floor between the cliffs past Fischer's Tower — buffalo, zebra, eland and giraffe on both sides of the track — then down into Ol Njorowa gorge with a KWS guide. Beyond it the steam pipes of the Olkaria field run over the road on gantries, and the geothermal spa at the end is a hot pool fed by the plant's waste brine.
Crescent Island and the flower farms
Crescent Island is a private sanctuary on a drowned crater rim with no predators on it, which is why you walk rather than drive — giraffe, waterbuck and zebra at close range on foot for a couple of hours. Afterwards look properly at the greenhouses along the lake: Naivasha grows a large share of the cut flowers sold in European supermarkets, and the argument about what that does to the lake's water is the local argument.
Elementaita to Nakuru
North on the old road past Lake Elementaita, which is small, shallow, soda-white at the edges and part of the same UNESCO inscription as Nakuru and Bogoria. Into Nakuru by early afternoon, then up to the rim of Menengai — a caldera twelve kilometres across, with the drilling rigs and wellheads of the state geothermal company scattered across the floor of it.
Lake Nakuru
The park is fenced, which sounds like a compromise and is the reason it holds both black and white rhino at densities you will not match anywhere else on this route. Baboon Cliff for the overview, the lakeshore for buffalo and Rothschild's giraffe. The flamingo numbers here collapsed after the lake rose through the 2010s and drowned the shallows they fed in — the birds moved north, mostly to Bogoria, which is where you are going next.
North to Lake Bogoria
Two and a half hours up the valley through Mogotio and Marigat, and the country dries out as you go. Bogoria is a narrow trench of a lake under the Siracho escarpment with geysers and hot springs along the western shore at Loburu — water arriving at close to boiling, steam standing off the ground, and lesser flamingo feeding in the shallows a few metres away. The ground near the vents is thin and people have been badly scalded. The Endorois were moved off this shore when the reserve was gazetted in the 1970s; in 2010 the African Commission on Human and Peoples' Rights found the eviction unlawful — the first African ruling to recognise an indigenous community's claim to ancestral land — and most of what it ordered has still not been done. The gate fee you pay is part of what the case is about.
Lake Baringo
An hour north and the water turns fresh — Baringo is the odd one out in the chain, not soda but drinkable, with hippo and crocodile in it and something over four hundred bird species recorded around it. Take a boat from Kampi ya Samaki in the last hour of light. The lake rose several metres through 2020 and drowned lodges, a school and a stretch of the main road; the ruins are still standing in the water and the boatmen will take you past them.
Across the Kerio Valley to Iten
The hardest short drive of the route and the best one. Back down the lake road to Marigat, then west and up into the Tugen Hills to Kabarnet, down the far side to the Kerio river at about a thousand metres, and up the Elgeyo escarpment in a series of switchbacks to Iten at 2,400. A hundred and forty kilometres and something over three hours. Read the security note before you set off — this is the stretch of the route that carries one. Stop at the top and look back at where you have been driving for a week.
Running country
Iten is a small town on the edge of a cliff that has produced an implausible share of the world's distance running. Lornah Kiplagat opened the High Altitude Training Centre here in 1999 and the camps multiplied around it. Turn up at Kamariny track at six in the morning and watch, or join the slowest group on a dirt road out towards Singore and understand within a kilometre why the altitude is the point.
Down to Kakamega Forest
Off the escarpment and west through Eldoret into the maize and sugar country of the western highlands. Kakamega is what is left of a rainforest that once ran continuously to the Congo basin: about 240 square kilometres, and less than half of that still closed canopy, isolated long enough to hold primates, hornbills and butterflies found nowhere else east of Uganda. It is also surrounded by some of the densest rural settlement in Kenya, and what survives depends on whether the households along its edge can get firewood, grazing and land anywhere else — the fence being built around the reserve is an argument about that, not about tourists. Sleep at Buyangu in the northern block.
The forest, then Kisumu
Walk at first light with one of the guides from the gate — blue monkey and black-and-white colobus overhead, and the dawn chorus, which is the actual reason to be here. Out by mid-morning and south to Kisumu on Lake Victoria. Dunga beach in the evening for the fishing boats and a plate of tilapia, which is the town's single fixed institution.
South and east into the Mara Triangle
The western approach: Ahero, Kisii, then Kilgoris, where the tarmac ends and sixty kilometres of murram run down to Oloololo Gate on the Siria escarpment. The Mara Triangle is the third of the reserve west of the Mara river, managed since 2001 by a not-for-profit company on behalf of the county — fewer vehicles, better tracks, and a hard line on off-road driving. Arrive in time for an evening drive.
The Triangle
Out at six. The Triangle is open short grass with the escarpment on one side and the river on the other, and it holds resident lion, cheetah and something like ten black rhino, followed daily by the Conservancy's own rhino unit — the Mara is the only place in Kenya whose black rhino were never shot out and restocked from elsewhere. Between roughly July and October the wildebeest are here and the crossing points on the Mara river below Serena are where everyone waits — for hours, often for nothing.
The river, and the road back
A last morning along the river and its hippo pools — be through the gate by ten if you slept inside the reserve, or the day costs another ticket — then cross at Purungat bridge and out through Sekenani for the long drive back over Narok and the Mai Mahiu escarpment. About seven hours, and you will have done nothing else that day. The alternative is the light aircraft from Kichwa Tembo airstrip to Wilson in Nairobi: forty-five minutes rather than seven hours, but US$200 or so a head one way, and if you have been driving yourself it leaves a hired vehicle in the Mara and a one-way drop fee to agree with the rental company before you book the seat.
Good to know
Almost everyone needs an Electronic Travel Authorisation before boarding — apply at etakenya.go.ke, budget around US$30 plus the service charge, and allow at least three working days. The 90 days on it are the window in which you may use it to enter, not a stay: how long you get is stamped at the desk on arrival. A yellow fever certificate is demanded of arrivals from countries with a risk of transmission rather than from everyone, but Kenya is itself on that list for onward destinations, so if this trip is part of a longer one you probably want the certificate; since 2016 it is valid for life and no country may require a booster. Malaria is the real medical question here and the route crosses in and out of risk: Nairobi, Nakuru and Iten sit high enough to be low-risk, while the Lake Victoria basin, Kisumu, Kakamega, the Baringo lowlands and the Mara are not, so most travel clinics will simply prescribe prophylaxis for the whole fifteen days. Park fees rose steeply on 1 October 2025 under the Wildlife Conservation and Management (Access, Entry and Conservation) (Fees) Regulations 2025: non-residents now pay US$80 at Nairobi National Park, US$90 at Lake Nakuru and US$50 each at Longonot and Hell's Gate, plus about US$10 a day to take a bicycle into Hell's Gate. The tourism industry challenged the increase in the High Court and the new rates have been charged through the case anyway, so price the trip off KWSPay on the day rather than off anything printed. KWS gates are cashless — pay through eCitizen or the KWS app before you arrive, because a card reader at a remote gate is not something to rely on. The Maasai Mara is not KWS: it is Narok County, paid separately, and the non-resident rate is US$100 per person per day from January to June and US$200 from July to December. That ticket runs twelve hours, six in the morning to six at night, whatever time you bought it — rolling up at five for an evening drive costs a full day — and if you sleep inside the reserve it carries you through the night provided you are out of a gate by ten the next morning. Lake Bogoria is Baringo County and charges its own fee again, around US$50. Self-drive is genuinely realistic on this route — tarmac from Nairobi to Marigat, over Kabarnet to Iten, and on through Eldoret to Kisumu — but you want high clearance and four-wheel drive for the murram beyond Kilgoris and for the black cotton soil inside the reserve, which becomes impassable rather than merely difficult after rain. One stretch does carry a security warning and it is the one this route drives on day nine: banditry and cattle raiding across Baringo, Elgeyo-Marakwet and West Pokot have brought repeated police and army operations, and the Kerio Valley is named specifically in British and other foreign-office advice, with curfews and movement restrictions imposed and lifted at short notice. The Marigat–Kabarnet–Iten road is normally busy with matatus and unremarkable, but check your government's advice the week you travel rather than the month you book, ask at your lodge the morning you drive it, and do not drive it after dark — which is good advice for the whole country, where unlit lorries and livestock make night driving the single largest risk on the trip. The long rains run roughly March to May and the short rains November to December. Kenya drives on the left, and you need your national licence plus an International Driving Permit. Ol Njorowa gorge at Hell's Gate floods without warning from rain falling kilometres away and has killed people, so take the guide and do not go in under a wet sky. Get a Safaricom SIM at the airport: M-Pesa is how the country actually pays for things, and a fuel stop or a gate guide is far easier with it than without.
Shorter or longer?
Add four or five days: the Madaraka Express from Nairobi to Mombasa takes about five hours on the standard gauge line, and from there it is Diani's beaches or a flight up to Lamu, where there are no cars and the old town has been continuously lived in since the fourteenth century.
Nairobi, Longonot, Naivasha and Hell's Gate, Nakuru, Bogoria and back down the valley. Keeps the volcanoes, the geothermal country and the flamingos; cuts the escarpment crossing, the west and the Mara — which is also most of the cost.