Grand Site des Deux Caps, Protected coastal site in Nord-Pas-de-Calais, France.

The Grand Site des Deux Caps stretches 23 km along the Opale coast from Wimereux to Sangatte, between Boulogne-sur-Mer and Calais. It takes its name from two cliff groups 10.9 km apart: Cap Gris-Nez, made of clay and sandstone about 160 million years old, and Cap Blanc-Nez, a 150 m chalk cliff of rock roughly 90 million years old, white like those at Dover.

The site's protection began in 1978, when the Deux Caps was the first area in France to enter the Opération Grand Site process. It was awarded the Grand Site de France label in 2011, covering eight communes from Wimereux to Sangatte over 23 km of coast. In 2025 the label was renewed for eight years and the perimeter grew to eighteen communes, adding Audembert, Bazinghen, Hervelinghen, Marquise, Peuplingues and Wimille among others.

The name comes from the two cliff groups, Cap Gris-Nez and Cap Blanc-Nez, 10.9 km apart as the crow flies. The site lies within the Parc naturel régional des Caps et Marais d'Opale, and since 2025 its perimeter has grown from eight to eighteen communes, including Wimereux, Wissant, Escalles and Sangatte.

The two capes lie 10.9 km apart as the crow flies, so walking between Cap Gris-Nez and Cap Blanc-Nez covers a full day; plan a return or a shuttle. The cliffs are chalk and clay and crumble, so keep to the marked paths along the top edge. Five Natura 2000 zones protect the clifftop turf and migrating birds.

The two capes lie 10.9 km apart as the crow flies, and the site's rock records two distant eras: the grey clay and sandstone of Cap Gris-Nez is about 160 million years old, while the chalk of Cap Blanc-Nez, 150 m high, is about 90 million years old. The cliffs began forming through erosion and faulting.