The Mamiri Forest Reserve is found in Ghana. It was established in 1949, and the site covers 45 km (17 sq mi). It has a long, narrow shape, extending for about 15 km (9.3 mi) from north to south, and only 2–4 km (1.2–2.5 mi) from east to west (Oates, 2006). Mamiri lies on the boundary between the wet evergreen and moist evergreen forest zones (Hall and Swaine, 1981).

The terrain is hilly, with the hills strongly dissected by steep-sided deep valleys. These valleys become flooded during the rainy season, creating swampy habitats.

The estimate terrain elevation above sea level is 128 metres.

There are no recent estimates of chimpanzee abundance in Ghana. The last estimate was made by Teleki's (1989), which estimated between 300 and 500 chimpanzees to be present in Ghana. The chimpanzee's presence was confirmed during field surveys in 2005 at this site (Oates, 2006), however recent surveys in 2009 failed to confirm their survival. (Gatti, 2009).

• Hall, J.B. and Swaine, M.D. (1981) Distribution and Ecology of Vascular Plants in Tropical Rain Forest. W. Junk Publishers, Den Haag.
• Oates, J. (2006) Primate Conservation in the Forests of Western Ghana. Unpublished report to the Wildlife Division, Forestry Commission, Ghana