A crater lake on the border
Lake Chala sits in a steep-sided crater on the Kenya–Tanzania border east of Kilimanjaro, in Rombo District of Kilimanjaro Region. Rombo District Council places it about forty-five kilometres off the Moshi–Taveta road, entered from the Tanzanian side through the Holili area, and describes it as the product of a volcanic eruption whose crater has since subsided.
The council also records the feature that makes the lake genuinely unusual: no river flows into it and none flows out. The water is fresh and it holds freshwater fish. The council reports a suggested geological connection between the lake and Kilimanjaro, which is the standard explanation for how a closed crater with no surface inflow stays full.
The depth figure, and why it is not repeated here
Rombo District Council’s own account states, in a single sentence, both that the lake is approximately three thousand metres deep and that no scientific study has yet confirmed its depth.
The second half of that sentence is the useful half. The first half cannot be right: three thousand metres would make a crater lake a few hundred metres across one of the deepest bodies of fresh water on earth, which is not possible for a feature of this size. No depth is published on this page. What the council is telling you, underneath the number, is that the lake has never been properly surveyed, and that is the honest position to arrive with.
Getting to the water is not straightforward
The crater walls are steep and the descent to the shore is not a stroll. More to the point, the council records that the Tanzanian side of the lake area consists of about twenty-three hectares of privately owned farmland, which it offers as a site for hotel and campsite development. The shore is therefore private land in practice as well as in principle, and access is arranged rather than assumed.
Nothing published by any Tanzanian authority addresses swimming, boating or safety at the lake. Where the water is concerned, treat an absence of guidance as an absence of guidance and ask locally before getting in.
What it is good for
The lake is a viewpoint and a landscape rather than an activity. The colour of the water, which shifts through the day, and the crater rim looking across into Kenya are the reasons to come. It suits a half day out of Moshi taken together with the Rombo side of the mountain, and it rewards walking on the rim and birding a great deal more than it rewards a quick stop for a photograph.
Common questions
How deep is Lake Chala?
Not established. Rombo District Council publishes a figure of about three thousand metres while stating in the same sentence that no scientific study has confirmed the depth. The figure is not credible; the admission is the reliable part of it.
Is Lake Chala in Tanzania or Kenya?
Both. The border runs through it. The Tanzanian side is in Rombo District, Kilimanjaro Region, reached through the Holili area.
Why has the lake no inlet or outlet?
Rombo District Council records that it has neither, and reports a suggested geological link with Kilimanjaro, which is how a closed crater with no surface inflow is generally explained. No study confirming the mechanism is published by the council.