Seekoeivlei Nature Reserve is an expansive wetland spanning some 30 km2 (or 4,754 hectares) near the town of Memel in the Free State, South Africa.

It lies nearly 2000 m above sea level near the Drakensberg escarpment and close to where the Free State, Mpumalanga, and KwaZulu-Natal meet.

Two parts of the Sneeuwberg Protected Environment connects with its south-western border.

[2] Just north of Memel, the Pampoenspruit meets the Klip River, a tributary of the Tugela River, in a 25-km2 swamp with consisting of a myriad of marshes, pools, floodplains, lakes, and grasslands that often flood during the rainy season.

The following birds are especially common there: Probably due to the cold temperatures at this altitude, snakes are not found here.