Lake Ulubat is about 30 kilometers west of Bursa. Ulubat is one of the largest freshwater lakes in Turkey. Ulubat is a tectonic lake and is 13,500 hectares in size. It’s 22 kilometers long and about 10 kilometers long. Although the average depth is 2.5 meters, most places range from 1-2 meters. Mustafakemalpasa is the most important river that feeds the lake. Ulubat Lake, which is included in the “Living Lakes Project” which has only 38 members in the world, is one of the most important wetlands in Europe and the Middle East in terms of bird presence. The little cormorant is home to endangered birds such as the crested pelican and the bony terr. Saccharine, twilight heron, spoonmaker and applehead patka are also among the important inhabitants of the lake.
The lake, formerly Known as Apoleont, also contains archaeological riches around it. Historical values surrounding Miletepolis, Th eodoros Church, Apollonia, Uninhabited Khan and Aktopraklik Höyük lake. Lakeyaz in Lake Ulubat is connected to the mainland by a central bridge. At the entrance of Gölyazı there is a sycamore that grows to be about 700 years old; It’s called “weeping sycamore” because there’s water coming out of it. Lake Ulubat is very rich in aquatic plants. It has the largest lotus deposits in Turkey. There are nine islands in Ulubat, the eldest of which are Halil Bey. These are especially the wintering area of the waterbirds. More than 200 bird species have been recorded in Lake Ulubat to date. Among the species that breed in the area are night herons, spooners, paddy, big-eyed and swamp swallows. It is one of the most important breeding grounds in Turkey for cormorant.
Stork festivals are held every year in the villages around the lake. Lake Ulubat is also important for fishing. There are 21 fish species in the lake, where a large amount of crayfish was once seen. Nowadays, the most common fish species are carp and cranes.