[2] The natural park is shared among seven different municipalities: Cosio di Arroscia, Mendatica, Montegrosso Pian Latte, Pigna, Rezzo, Rocchetta Nervina, Triora.

[4] Most of the protected area is covered by sedimentary rock mountains, with the predominant type of bedrock represented by flysch.

Rare mammals in the park include stoats (Mustela erminea), mountain hares (Lepus timidus), European pine martens (Martes martes) and European snow voles (Microtus nivalis), as well as wolves (coming from Roya valley) and wildcats (Felis silvestris).

In the woods neststhe black grouse (Tetrao tetrix), and the eagle (Aquila chrysaetos), although close to the limit of its geographic range, lives on the park's cliffs.

The caves located in the park host a good variety of bats; among insects some endangered species of coleoptera of the protected area are Haptoderus nicaeensis, Percus villai and Pterostichus morio.