It covers an area of 46.13 square kilometres (17.81 sq mi) of forests, lakes, meadows and peatlands.

The area of the Tuchola Forest was shaped by the Scandinavian Glacier; for the most part, it is covered by sandy plains.

There are more than 20 lakes in the park, some of them are pristine, of crystal-clear waters (e.g., Gacno Wielkie and Male, Nierybno, Gluche).

The national park is a heaven for birds — there are 144 species, including crane and eagle owl.

The symbol of the park — the wood grouse — until recently was common in the area, especially in the Forest District of Klosnowo.