The national reserve lies approximately 33km south of Mombasa town, in Kwale district of coast province. The coastal ecosystem comprise of a heterogeneous habitat including forestlands, exotic plantations, scrublands and grasslands. The ecosystem holds one of the largest coastal forests in East Africa after Arabuko-Sokoke forest.
The reserve is rich in flora and fauna and hosts the highest density of African elephant in Kenya. Other animal species found in the area are Sable antelope, black and rufous elephant shrew, bushy tailed mongoose and other small mammals like fruit bat. The forest is an important bird area and is endowed with forest birdlife while the grasslands hold localized species such as red-necked-Spurfowl, Croaking Cisticola and Zanzibar Red Bishop.