Na půl plynu (var. Meziplyn), Harmonika 3

Nature conservation: Climbing permitted year-round Nature Conservation Documents: NPR Jizerskohorské bučiny OOP 2021 2025, OOP 2021 maps, OOP 2021 rocks outside polygons, OOP 2021 ice climbing, authority Nature Conservation Agency Jizera Mountains

Part of the terrain is in the Jizerskohorské Beech Forest National Nature Reserve. Climbing in the reserve is allowed year-round only on designated objects and in areas defined in the map appendix. It is not allowed to modify and change the surface of the rock, ice climbing is allowed with sufficient ice thickness in designated sectors. Drytooling is only allowed in the quarry in Oldřichov. Bird nesting must be reported. - Magnesium is only allowed from grade VIIIb of the Jizera scale.

Nature protection: Climbing on rocks in NPR allowed all year round. Detailed information for individual rocks. Nature Protection Documents: NPR Jizerskohorské bučiny OOP 2021 2025, OOP 2021 maps, OOP 2021 rocks outside polygons, OOP 2021 ice, OP body CHKO Jizerské hory

• The Jizera Mountains climbing rules apply.
• Chalk is allowed only from grade VIIIb (Jizera scale).

Climbing in the Jizera Mountains PLA is governed by Order No. 200/1999 and OOP No. 4/2021. In zone 1 climbing off marked trails is banned except on the traditional crags listed in the OOP annex; in zone 2 climbing is allowed on all rock objects, but bouldering is not. Check the ČHS crag database.