Highlight • Other
Hiking
4.9
(151)
Running
5.0
(42)
Mountain biking
5.0
(2)
Cycling
5.0
(1)
The Barrage du Pas-du-Riot is a historic weight-arch dam nestled within the scenic Pilat Regional Natural Park in France. Standing at an elevation of 866 meters, this impressive structure is located in the Loire department, part of the Auvergne-Rhône-Alpes region, near the city of Saint-Étienne. Built on the Furan River between 1873 and 1878, it serves as a vital source of water supply and flood protection for the Saint-Étienne metropolitan area, and is a significant landmark in the Furan Valley.
Visitors are consistently drawn to the Barrage du Pas-du-Riot for its striking natural beauty and its remarkable engineering. Many describe it as a magnificent work, a must-see in the region around Saint-Étienne, offering picturesque landscapes that invite exploration. The dam's elegant parabolic design, a pioneering example of arched masonry dams in Europe, continues to impress those who visit, making it a popular destination for walkers and hikers alike.
Before heading out, it's good to know that the area around the Barrage du Pas-du-Riot is well-suited for leisurely walks and more extensive hikes. A dedicated discovery trail makes it a family-friendly spot, winding through the rich forest ecosystems of the Pilat Regional Natural Park. While enjoying the fresh air and natural surroundings, please note that swimming in the dam is prohibited. Parking near Barrage du Pas-du-Riot is generally available, making access convenient for most visitors.
The Barrage du Pas-du-Riot offers enjoyable activities throughout the year, with many finding it particularly pleasant for walking routes Barrage du Pas-du-Riot during milder seasons. It's a perfect spot for those looking to enjoy nature and fresh air. A popular activity for many is to combine a visit here with the nearby Barrage du Gouffre d'Enfer, creating a rewarding circuit for hikers and walkers exploring the Furan Valley.
The sheer scale and historical significance of the Barrage du Pas-du-Riot are often highlighted by those who visit. It's a place where you can admire a structure built over five years in the late 19th century, designed to augment the water supply that the Barrage du Gouffre d'Enfer, completed just three years prior, could no longer sufficiently provide. The surrounding forest trails offer serene views and a chance to appreciate this impressive feat of engineering in its natural setting.
Whether you're interested in history, engineering, or simply a pleasant walk in nature, the Barrage du Pas-du-Riot trails offer a variety of experiences. You can explore numerous hiking and walking routes in the surrounding Pilat Regional Natural Park. To discover the best randonnée Barrage du Pas-du-Riot options and plan your adventure, komoot offers a wide selection of routes tailored to different preferences and fitness levels.
This Highlight is in a protected area
Please check local regulations for:
Tips
March 9, 2023
Running
November 23, 2021
Hiking
November 1, 2022
Hiking

Sign up for a free komoot account to get 6 more insider tips and takes.
Sign up for free
Nearby routes
Best routes near Pas-du-Riot Dam
Details
Informations
Elevation 870 m
Weather
Powered by Foreca
Tuesday 2 June
20°C
7°C
14 %
Additional weather tips
Max wind speed: 11.0 km/h
Most visited during
January
February
March
April
May
June
July
August
September
October
November
December
The area around Barrage du Pas-du-Riot offers a variety of trails, from easy, family-friendly discovery loops to more extensive hikes within the Pilat Regional Natural Park. Many routes provide scenic views of the dam, the Furan Valley, and the surrounding forest. You can find circular walks that combine a visit to this dam with the nearby Barrage du Gouffre d'Enfer for a longer adventure.
While the intro mentions milder seasons are pleasant, Barrage du Pas-du-Riot can be visited in winter. However, conditions may vary. Trails might be slippery or covered in snow, so appropriate winter hiking gear, including sturdy, waterproof boots and warm clothing, is essential. Always check the local weather forecast before heading out.
Yes, dogs are generally welcome on the trails around Barrage du Pas-du-Riot. However, it is important to keep them on a leash, especially in protected areas of the Pilat Regional Natural Park, to respect wildlife and other visitors. Always clean up after your pet.
Parking is generally available near the Barrage du Pas-du-Riot. Specific parking areas can be found close to the dam itself or at trailheads leading to the dam. During peak seasons or on weekends, these spots can fill up quickly, so arriving earlier in the day is advisable to secure a convenient parking space.
While there might not be facilities directly at the dam, the nearby village of Planfoy and the larger city of Saint-Étienne offer various amenities, including cafes, restaurants, and accommodation options. These are typically a short drive away from the dam.
Direct public transport to Barrage du Pas-du-Riot can be limited. The most convenient way to reach the dam is usually by car. However, you can check local bus services from Saint-Étienne towards Planfoy, which might get you closer, though a final walk or taxi ride may still be necessary.
Beyond the impressive 19th-century engineering of the dam, visitors can explore the rich forest ecosystems of the Pilat Regional Natural Park. The Furan Valley offers picturesque landscapes, and many trails lead to viewpoints with panoramic vistas. The nearby Barrage du Gouffre d'Enfer is another significant historical dam often visited in conjunction with Pas-du-Riot.
No, swimming is strictly prohibited in Barrage du Pas-du-Riot. The dam is a vital part of the water supply system for Saint-Étienne, and for safety and water quality reasons, recreational swimming is not permitted.
The difficulty of hikes around Barrage du Pas-du-Riot varies. There's a dedicated 'discovery trail' which is considered easy and family-friendly, suitable for all ages. Longer routes, especially those combining both the Pas-du-Riot and Gouffre d'Enfer dams, can be moderate, involving some elevation gain and longer distances. Hikers should choose routes appropriate for their fitness level.
No, generally, no specific permits are required to access Barrage du Pas-du-Riot or to hike on the public trails within the Pilat Regional Natural Park. Access is free and open to the public. However, visitors are expected to respect park regulations, such as staying on marked trails and not disturbing wildlife.
Barrage du Pas-du-Riot, built between 1873 and 1878, is historically significant as one of Europe's pioneering arched masonry dams. It was constructed to augment the water supply for the rapidly growing city of Saint-Étienne and to provide flood protection, as the earlier Barrage du Gouffre d'Enfer had become insufficient. It represents a remarkable feat of 19th-century engineering.