Grimper à Skály u Drnovce (Dutý kámen)

- It is forbidden to damage or modify the surface of the rocks, e.g. by improper handling of ropes, using unsuitable footwear. - Belaying only with fixed belays and removable belay devices that do not damage the rock. - It is forbidden to use magnesium and other substances that increase friction. - Climbing only on dry rocks, in daylight. - New routes only with the consent of the nature conservation authority. - Careful behavior towards nature, it is forbidden to damage the rocks and the surrounding area. - In the event of nesting, it is necessary to interrupt the ascent and report the nesting to the Regional Authority of the Liberec Region.

Nature Conservation: Seasonal climbing ban from November 1st to June 30th, some towers permanently banned, Borová věž without restrictions. Nature Conservation Document: PP Dutý kámen - OOP 2021-2030, OP authority KÚ Liberec Region (Liberec Region Authority)