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Lake Ol Bolossat

The only natural lake in central Kenya, a shallow wetland below the Aberdares holding hippos and a long bird list.

Updated 31 August 2026

WhereNyandarua
Nearest cityNyahururu
Best seasonJune to October and January to March
Time to allowHalf a day
Getting thereBetween Nyahururu and Ol Kalou, about 3 hours from Nairobi
EntrySmall fee at community access points

Ol Bolossat sits in a shallow basin between the Aberdare range and the Rift escarpment at around 2,300 metres, and it is the only natural lake in central Kenya, feeding the Ewaso Ng'iro river that runs north into Samburu country. It is shallow and fringed with reeds and papyrus, which makes it excellent for birds: over three hundred species have been recorded, including large numbers of storks, herons, ducks and the grey crowned crane that is the local emblem, and it is an important stop for migrants. Hippos live in the deeper sections. The lake was gazetted as a protected area in 2018 after years of pressure from drainage, farming encroachment and water abstraction, all of which had shrunk it badly. Access is through community groups at several points, and birding is best done with a local guide who knows the water.

What's there

  • The reed wetland - shallow water and papyrus fringes below the Aberdares.
  • Grey crowned cranes - among the most visible of the lake's birds.
  • Hippos - present in the deeper parts of the lake.
  • Highland setting - the Aberdares one side, the Rift escarpment the other.

When to go

Dry seasons for access tracks; the birding is good year-round with the widest variety from November to March when migrants are present. Early morning is best for both birds and light. It is cold at this altitude in the early hours.

Practical notes

Facilities are essentially nonexistent: no hides, no visitor centre, and access arranged informally through community groups. Tracks are rough. The lake has shrunk and its edges are farmed right up to the water in places. Bring your own binoculars.

Nearby

Thomson's Falls is at Nyahururu; the Aberdares rise to the east.

Key facts

Location0.1557° S, 36.4405° E · map

Source: Wikidata, item Q35733927, read on 18 October 2026.

What to pack for Lake Ol Bolossat

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  • Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
  • Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon
  • Daypack with rain cover - 20-30 litres holds water, snacks, layers and a first-aid kit. Find on Amazon
  • Offline maps + a power bank - Download the trail before you lose signal; carry backup charge. Find on Amazon

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