Lake Opeta and its surrounding swamps are located in eastern Uganda, 25km north-east of Kumi town. The Ramsar site stands 1,050 m above sea level and covers an area of 68,913 hectares. The wetland system represents the easternmost part of the Lake Kyoga basin. It occupies an extensive floodplain between the Lake Bisina Ramsar Site (which it drains towards Lake Kyoga) to the west and the base of Mount Elgon, a massive extinct volcanic massif, to the south-east. The Lake Opeta wetlands marks the southern limits of the vast, arid region of Karamoja which extends along Uganda's eastern flank between Mount Elgon and the distant Sudan border, nearly 300km to the north.