Hruboskalsko Rock City, Nature reserve in Bohemian Paradise, Czech Republic.

Hruboskalsko Rock City is a nature reserve in the Bohemian Paradise, characterized by sandstone towers, cliffs, and natural passages spread across about 219 hectares. The terrain is connected by marked trails that lead to notable points including the Mouse Hole rock fissure and the viewpoint near Hrubá Skála Castle.

The sandstone formations took shape over 18 to 20 million years, with the base of the rock city laid down in the late Pleistocene and the honeycomb cavities, ledges and rock windows formed during the Holocene. The area was declared a nature reserve on 22 April 1998 by decree of the Bohemian Paradise Protected Landscape Area administration, covering 219.2 hectares.

Hruboskalsko is one of the oldest Czech climbing areas, with towers such as Kapelník, Lebka, Maják and Osudová. The Czech Climbing Federation and the Bohemian Paradise Protected Landscape Area administration have agreed on conditions for climbing on the sandstone.

The terrain suits different skill levels, with paths ranging from easy walks to challenging climbing routes. It helps to go with local knowledge or a map to navigate the many branching trails confidently.

The reserve protects relict pine woods that survive only in scattered patches on the tops of the towers and massifs, while damp gorges between the rocks carry acid beech forest. The sandstone here is weakly lithified quartz sandstone up to 120 m thick, and the towers reach 60 m.