The Slovak Karst (Slovak: Slovenský kras) is one of the mountain ranges of the Slovenské Rudohorie Mountains in the Carpathians in southern Slovakia. It consists of a complex of huge karst plains and plateaus. Since 1973 it was a protected landscape area. On 1 March 2002 Slovak Karst National Park was declared. It is also a UNESCO Biosphere Reserve and part of it forms UNESCO World Heritage site Caves of Aggtelek Karst and Slovak Karst.
The highest peak is Jelení vrch at 947 m AMSL. Important rivers are the Slaná (Sajó), the Štítnik and the Turňa. The Slovak Karst lies in the north temperate zone and has a continental climate with four distinct seasons. The area is composed of several layers of Mesozoic limestone and dolomite, beneath which there is non-permeable sandstone, limestone and slate. The plains are covered by oak-hornbeam forests, the hills by oak forests and the karst pits by spruce forests. Beech forests are in the northern parts.
The plains (plateaus) have many karst formations, such as karst pits with diameters of up to 250 m and depths of about 45 m, conical hills, blind and half-blind valley and dales. The subterranean karst is known for its deep vertical abysses, such as: