| Watershed name | Catchment areaa (ha) | Max. altitudeb (m) | Gazetted forest areac (ha) | Main river |
| Mt. Kenya | 1,253,959 | 5199 | 203,145 (4% cropland) | Tana, Athi |
| Aberdare | 1,097,895 | 4001 | 104,078 (11% cropland) | Ewaso Ngiro, Athi |
| Mau Forest Complex | 874,746 | 3098 | 404,706 (25% cropland) | Mara, Nyando, Yala |
| Cherang’any Hills | 212,267 | 3365 | 120,841 (19% cropland) | Nzoia, Turkwell |
| Mt. Elgon | 249,996 | 4320 | 72,547 (15% cropland) | Nzoia, Turkwell |