Large parts of the Jizera Mountains are under some form of protection. In the smaller Polish parts, the peat bogs in Jizera Valley are part of a relatively small nature protection of about 5 km²; Rezerwat Torfowiska Doliny Izery. In the Czech parts, Jizera Mountains Protected Landscape Area (CHKO Jizerské hory) covers 368 km², or almost all of the Czech parts of the mountains. This landscape protection contains several reserves, including the Jizera Dark Sky Park (Rašeliniště Jizery), dedicated to star watching.