Kakamega Forest is a tropical rainforest situated in the Kakamega and Kisumu Counties of Kenya, North West of the capital Nairobi, and near to the border with Uganda. It is Kenya's only tropical rainforest and is said to be Kenya's last remnant of the ancient Guineo-Congolian rainforest that once spanned the continent.
The forest including reserves encloses about 238 square kilometers, a little less than half of which currently remains as indigenous forest. The forest is elevated at predominantly between 1500 m and 1600 m above sea level. In the north of the forest is the 4,468 hectares (45 km2; 17 sq mi) Kakamega National Reserve, given national forest reserve status in 1985. Just to the north is the Kisere Forest Reserve. Throughout the forest are a series of grassy glades, ranging in size from about 1 to 50, with a few larger clearings. The origins of the glades are uncertain. Some are certainly recent clearings, but others predate recent records. These may have originated from past human activity such as cattle grazing or may be the result of herbivory and movements by large mammals such as buffalo and elephants (both now extirpated from the region). The glades vary a great deal in structure, some being open grass and others having a considerable number of trees or shrubs. A number of streams and small creeks run through the reserve. The larger creeks are usually bordered by a few to tens of meters of forest on either side which divide the glades, while the smallest creeks flow through open grasslands, often forming small marshy patches.
The Kakamega Forest is very wet, with an average of 1200 mm – 1700 mm of rain per year. Rainfall is heaviest in April and May ("long rains"), with a slightly drier June and a second peak roughly in August to September ("short rains"). January and February are the driest months. Temperature is fairly constant throughout the year, ranging between 20c - 30c.
Flora found in the park include some of Africa's greatest hard and soft woods: Elgon teak, red and white stinkwood and several varieties of croton and aniageria altisima. There are 380 recorded species of plants. This includes 60 species of ferns, 150 species of trees and shrubs, and 170 species of flowering plants including 60 species of orchids with 9 species found only in this forest.