The roughly triangular area of the modern-day park was originally an inland sea which had receded, leaving a mostly infertile depression which did not attract human habitation.

The park extends southeast from Arcachon Bay in Pays de Buch and encompasses the entire Leyre River.

[3] The forty-one member communes are:[4] The park maintains a bird sanctuary on Arcachon Bay, the parc ornithologique du Teich.

[6] The park is administered by a joint union of local authorities in the Syndicat Mixte du Parc Naturel Régional des Landes de Gascogne, a deliberative assembly of 45 members.

The scene depicts a leaping fox frustrated in its hunt: a solid horizontal line separates him from the hen who strolls serenely in the sun.