Dumbier is the highest hill (2043m) and the lowest area is situated near the city Banska Bystrica (400m). The length of the area of this park from the east to the west is about 80 km and from the north to the south it is about 30 km.

This territory is constitued of granite, dolomits and limestones. In the Triasic limestones and dolomits there is the biggest system of caverns in Slovakia – the caverns Demanovske jaskyne (the most known ones are the caverns Demanovská ladova jaskyna, Jaskyna Slobody, Pusta and Okno ). The rivers Hron, Vah, Hornad and Hnilec spring here.

Not far from the national park there is a basin called Liptovska Mara. The most known acidulous water is Korytnica. A cold climatic area dominates here. Higher situated territories are influenced by a cold climatic area. The average of precipitation in one year is 900 – 1000 mm and in the highest situated territories more than 1200 mm.

The flora of Low Tatras is very similiar to the flora of High Tatras. There are different high mountain species and East Carpathian endemits. A big area of the park is covered by the forests. The places of growing trees are not influenced only by type of soil, climate or altitude, but also by man. Due to the warm climate in the valleys of Hornad and Vah, there are oaks. In the south there is plenty of beech, but in the north it is rare. Pines, fir trees, maples, mountain ashes, ash-trees, elms and the others grow around the river Cierny Vah. In the highest areas there are dwarfed pines, mountain ashes, small pines and small willows.

In the Low Tatras there are great conditions for the animals from north. Many bugs that live in high mountains live here. There are also butterflies, amphibians (for example salamander), frogs (toad), reptiles (lizard, viper and the others), different species of birds (thrush, capercailzie, woodcock and the others): carnivorous animals (for example eagle and falcon) and owls (eagle-owl). Small mammals (mouthpiece), rodent (squirrel or marmot) live here, too. There are bats in the caves. We can also find here bears, lynxes, foxes, marten and the others. Rarely we can find wolves or badgers. There are also deers, roe-bucks and wild boars.