Nikaj-Mërtur Regional Nature Park, Regional nature park in Kukës County, Albania

Nikaj-Mërtur Regional Nature Park (Parku Natyror Rajonal Nikaj-Mërtur) is a regional nature park in the southeastern Albanian Alps within Tropojë, in Kukës County. It lies in the area of the historical Nikaj and Mërturi tribes and holds alpine landscapes, deep valleys, vertical cliffs, dense coniferous and deciduous forests, small lakes and rivers. The IUCN lists it as Category IV, and it borders Theth National Park and Valbonë Valley National Park.

The land was home to the Nikaj and Mërturi tribes for centuries, and their names are still used to identify the region and the park itself. These communities lived under a customary code known as the Kanun, which governed daily life and social order in the mountains.

The park lies in the territory of the historical Nikaj and Mërturi tribes, whose names it carries. The two tribes gave the region and the protected area their identity, and the park is named after them in Albanian as Parku Natyror Rajonal Nikaj-Mërtur.

Reaching the park takes careful planning since mountain roads can be rough and a four-wheel-drive vehicle is strongly advisable for most routes. Simple guesthouses are available in nearby villages, but booking ahead is recommended as options are limited.

The park forms an ecological bridge between Valbona Valley National Park and protected areas in Kosovo and Montenegro, which makes it a key passage for large animals like lynx and brown bears moving across the region. Without this connection, animal populations on either side would be cut off from each other.