Despite the geographical barriers encountered by the winds coming from the northwest, the yearly rainfall averages 800 mm (31 in).

But the true ornithological treasure is the middle peak woodpecker that has its largest population of Spain in this park.

The half-Mediterranean half-Atlantic climate in conjunction with the hard insolation and the atmospheric dryness give these species an ecological edge over beech trees.

Portuguese oaks can be found near the humid sectors around the rivers and acquire their maximum splendor in the limestone areas between the villages of Korres and Bujanda and also around Arlucea.

These trees are typical in subhumid climates with a 600–900 mm (24–35 in) per year precipitation and short summer droughts.

Due to the natural diversity and the slopes the terrain has the park offers many trekking paths for appreciation of the landscapes.

- The ascension from Antoñana to Soila through a forest allows viewing most of the mentioned tree varieties and a couple of especially wide and old lime-trees and yew-trees.