Lake Turkana occupies the Rift Valley and is identified as the largest of Kenya’s Rift Valley lakes. Its waters are described as quite shallow and slightly alkaline, yet sufficiently rich in fish to sustain communities living along its shores. The lake is therefore both a distinctive physical feature and an important economic resource.

Fishing is the main livelihood of local residents around Lake Turkana. The lake also contains a sizeable population of Nile crocodiles, adding a significant ecological dimension to the environment in which fishing communities work. Low rainfall characterizes the wider Rift Valley, making dependable access to lake resources especially important.

Lake Turkana forms part of a broader volcanic landscape marked by hot springs, steam jets, geysers, and evidence of former volcanic activity. Fertile volcanic soils can support highly productive agriculture where rainfall is adequate or irrigation is available, although the text emphasizes fishing as the dominant activity at the lake itself.