Lake Lubāns is the largest lake in Latvia (in Latvian: Lubāns, Lubānas ezers or Lubāna ezers).
The lake lies in the center of the Eastern Latvian Lowland. It is a shallow drainage lake, fed by the Rēzekne, Malta, Malmuta and Lisiņa rivers and several smaller brooks, with an outflow via the Aiviekste River into the Daugava River.
After the damaging spring floods in 1926, several dams and ditches were constructed. The elevation of the lake is allowed to fluctuate between approximately 90 and 93 metres above sea level. At an elevation of 90.75 m, the lake has a surface area of 25 km², increasing to about 100 km² at 92.75 m. In that state it is considered to be the biggest lake in Latvia.
Other small former lakes within the Lubanas basin have been artificially drained and the land used for agriculture.
Type – natural lake, reservoir
Primary inflows – Rēzekne, Malta, Malmuta, Lisinja
Primary outflows – Aiviekste River
Catchment area – 2,040 km2 (790 sq mi)
Basin countries – Latvia
Max. length – 15.7 km (9.8 mi)
Surface area – 25–100 km2 (9.7–38.6 sq mi)
Average depth – 1.6 m (5 ft 3 in)
Max. depth – 3.5 m (11 ft)
Surface elevation – 90–93 m (295–305 ft)
Lake Lubāns is surrounded by Lubāns wetlands (area 813 km2). It is a unique natural formation of European and global importance with an important role in the preservation of many protected species and biotopes. 225 bird species have been recorded in the lake surroundings, of which 51 are enlisted among the most protected species in Latvia.
6 vantage towers are available for bird-watching; a telescope and binoculars – at the Tourism Information Point of Lubāns wetlands.