It was declared as a National Park on April 29, 1965. The reason for creating a "National Park" is that "mixed forest plants are collectively in the same region". However, the presence of 7 small lakes that give the park its name and line up side by side are the most striking elements of this place. The lakes were formed as a result of the embankments formed by two landslides filling the valley, and their names reflect the fine taste of our foresters. The order of the lakes from north to south is as follows: Seringöl, Büyükgöl, Deringöl, Nazlıgöl, Kurugöl, İncegöl and Sazlıgöl. The area of the field is 1623 Ha. is. It is located in the Western Black Sea Region, north of Bolu province and south of Zonguldak province.
It can be reached from Yeniçağa at the 152nd km of the Ankara-Istanbul highway and from the Bolu city center at the 190th km by roads that diverge to the north. It is 42 km from Bolu Province.
Resource Values: Lakes of various sizes, rich vegetation resembling a forest sea, trout living in the lakes and the recreational use potential created by these values constitute the main resource values in the national park, which is located in a very rugged region of the Western Black Sea Region. Generally, the geological structure of the area is composed of serpentines and volcanic rocks. The lakes in the region; They are landslide lakes formed by the accumulation of water at the back as a result of the sliding masses blocking the valleys as a result of ground movements. Some of these are interconnected with bottom leaks.
The dominant vegetation in the national park is beech trees. There are also different types of trees such as oak, hornbeam, alder, larch, yellow pine, fir, elm, linden and yew.
With effective protection, there are wild animal species such as deer, roe deer, bear, pig, wolf, fox and squirrel, whose numbers are increasing in the national park and in the areas around it.
The first cultured trout breeding station in our country was established in this national park in 1969 and set an example in its spread in our country. Therefore, it has been a source of recreational angling. In addition to activities such as camping, daily picnic and tracking, it also offers its visitors rich landscape beauties for photography.