Saint-Nazaire-En-Royans

Saint-Nazaire-en-Royans brings together several clearly distinct themes: the aqueduct above the Bourne, the Grotte de Thaïs in the heart of the town, scenic routes, and guided trips on the Isère and Bourne. For planning, it helps to consider the type of experience each offers: architecture and regional interpretation sit alongside archaeological and geological features, while trails and river trips reveal the landscape in different ways.

Aqueduct and Espace Royans & Vercors

The Aqueduc de Saint-Nazaire-en-Royans is designed as a walkway above the Bourne and has 17 arches. The structure combines its distinctive arched form with a promenade above the river. If you are interested in architectural history, the aqueduct offers a specific point of interest; its connection to the Bourne is also part of its character.

The Aqueduc - Espace Royans & Vercors has a panoramic lift, an elevated walkway, orientation signs, information panels and talking terminals. The exhibition covers the Vercors Regional Natural Park, local heritage, historic routes, and the wildlife and plant life of the Vercors. Espace Royans et Vercors also offers a multisensory discovery of the area through sight, hearing, touch and smell. The route is accessible to people with all disabilities. Confirm any conditions relevant to your trip in advance.

Grotte de Thaïs: archaeology and geology

The Grotte de Thaïs lies in the heart of Saint-Nazaire-en-Royans. Two campsites and artistic objects attest to the presence of the Magdalenian and Azilian cultures over more than 3,000 years. Geological features add to the interest: a river resurgence formed the labyrinthine passages, and millennia-old concretions display red and black colours. The cave thus brings together traces of human activity and a much longer geological history.

Archaeology and geology provide distinct ways of exploring the town’s history: the campsites and objects offer clues to earlier cultures, while the passages and concretions illustrate how the cave formed. Access periods may vary, so check before your trip when visits are possible.

Hiking routes with different highlights

The circular route to Belvédère de Vanille is moderately difficult and 4.5 kilometres long. It starts and finishes at Parking Aqueduc in Saint-Nazaire-en-Royans. From the viewpoint, you can see the aqueduct and the Isère and Bourne valleys, with the Vercors massif’s three major gorges in the background. The extent of the view also depends on visibility. Trail conditions and markings may change; check them, along with the parking situation, before setting out.

Les coteaux du Royans crosses hillsides and walnut orchards before continuing along a scenic balcony road. From there, the view stretches across the Isère and Bourne valleys. The descent reaches the lake and the red-ochre rocks of Saint-Nazaire-en-Royans. This route’s landscape is shaped by the sequence of hillsides, orchards, valley views and rocks.

Another option is Au Fil de la Bourne: the route starts at the striking Aqueduc de Saint-Nazaire-en-Royans and follows the Bourne canal. When choosing a route based on its character, the options therefore offer different highlights: the moderately difficult circular route to the viewpoint, the succession of landscapes on Les coteaux du Royans, or the canal-side setting of Au Fil de la Bourne.

River trip and wetlands

The Bateau à Roue offers guided cruises on the Isère and Bourne between Saint-Nazaire-en-Royans and the village of La Sône. Schedules may vary; check the date planned for your trip in advance. Within the cruise area, marshes and reed beds provide habitat for waterbirds. For those interested in the area’s natural side, the wetlands offer a specific point of interest alongside the rivers.

Discover more destinations: Vercheny, Hostun, Valdrôme, Loriol-Sur-Drôme, Donzère, Le Chaffal, Chauvac-Laux-Montaux, Épinouze

For the broader travel overview: Drôme.