4.5
(373)
1,869
hikers
15
hikes
Hiking around Rieulay offers a unique landscape shaped by its industrial past, now transformed into a natural and recreational area. The region is centered around the Terril des Argales, the largest flat slag heap in Nord-Pas-de-Calais, which has been rehabilitated into a diverse natural environment. At its heart lies the Étang des Argales, an artificial lake divided into leisure and ornithological reserve zones, contributing to the area's distinct mineral and aquatic terrain. Rieulay is situated within the Scarpe-Escaut Regional Natural Park, providing a rich blend of natural features and gentle slopes suitable for outdoor activities.
Last updated: May 10, 2026
4.4
(10)
27
hikers
4.88km
01:17
40m
40m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.6
(53)
385
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Sign up for free
4.6
(17)
63
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.6
(17)
71
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.8
(11)
31
hikers
9.98km
02:34
50m
50m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
Get access to more routes and recommendations from other explorers.
Sign up for free
Already have an account?
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Start today with a free account
Your next adventure awaits.
Login or Signup
Beautiful walk on a magnificent site
0
0
Great place to run on several routes or hike with the family
0
0
The Rieulay slag heap, also known as the Argales slag heap, is the largest in the region with its 140 hectares. Formerly an industrial site for the storage of waste rock from the surrounding mines, it has been converted into a protected natural area and a place for leisure.
0
0
view of Lake Argales and the surrounding towns, at the highest point without going up very high
0
0
The Argales de Rieulay slag heap, the largest in the region (140 ha), has long since closed its mining page. A new story has been unfolding for several years now. That of a successful reconversion.
0
0
Artificial beach on the body of water
0
0
Panoramic view of the Rieulay site
0
0
Hiking in Rieulay primarily involves the unique landscape of the Terril des Argales, the largest flat slag heap in the Nord-Pas-de-Calais region. This former mining site has been rehabilitated into a diverse natural area with gentle, regular slopes. You'll find a mix of mineral and aquatic landscapes, including trails around the artificial Étang des Argales, which can sometimes evoke a 'Nordic' feel. Many trails follow former railway lines, offering accessible paths.
Yes, Rieulay is an excellent destination for easy hikes. Out of the 15 available routes, 10 are classified as easy, making them suitable for beginners, families, and those looking for a relaxed walk. These trails often feature gentle slopes and well-maintained paths, such as the Terril des Argales Loop, which explores the unique transformed landscape.
The primary natural features are the Terril des Argales itself and the Étang des Argales. The lake is divided into a leisure zone with a sandy beach and an ornithological reserve, offering diverse scenery. You can also find two belvederes on the terril that provide panoramic views of the surrounding landscape and protected natural zones. Rieulay is also part of the Scarpe-Escaut Regional Natural Park, known for its rich biodiversity.
Yes, many of the trails in Rieulay are circular, allowing you to start and end at the same point. Popular options include the Viewpoint over the lake – Argales Pond loop from Rieulay, which offers scenic views, and the Terril des Argales Beach loop from Rieulay, which takes you past the lake's sandy beach area.
While the region is very natural and welcoming to outdoor activities, specific regulations for dogs on trails within the Scarpe-Escaut Regional Natural Park or the ornithological reserve area of the Étang des Argales may apply. It's generally advisable to keep dogs on a leash to protect local wildlife, especially in areas designated as nature reserves. Always check local signage for any restrictions.
The routes in Rieulay are highly rated by the komoot community, with an average score of 4.5 stars from over 300 reviews. Hikers often praise the unique transformed mining landscape, the peaceful atmosphere around the Étang des Argales, and the accessibility of the trails for various fitness levels.
Yes, for those seeking a slightly longer or more challenging hike, Rieulay offers 5 moderate routes. An example is the Lac des Argales – Étang des Argales loop from Rieulay, which covers a distance of nearly 12 kilometers and provides an extended exploration of the lake and surrounding area.
The Terril des Argales and Étang des Argales area is well-equipped for visitors. There are usually designated parking areas available near the main access points to the trails and the sports nature base. These are typically free and provide convenient access to the various loops and paths.
Rieulay, being a hub for outdoor activities, offers some amenities. The sports nature base located on a portion of the Étang des Argales might have facilities. For more options, the village of Rieulay itself or nearby towns would provide cafes, restaurants, and other services for visitors.
Rieulay's trails are enjoyable throughout much of the year. Spring and autumn offer pleasant temperatures and beautiful natural colors, making them ideal for hiking. Summer is also popular, especially around the Étang des Argales where leisure activities are available. Even in winter, the unique mineral landscape can offer a distinct, serene experience, though some paths might be muddy.
Hiking times around the Étang des Argales vary depending on the specific loop chosen. For example, the Viewpoint over the lake – Argales Pond loop from Rieulay is about 5.1 km and typically takes around 1 hour 19 minutes. A longer option like the Lac des Argales – Étang des Argales loop from Rieulay, at 11.8 km, would take approximately 3 hours.
Yes, the Terril des Argales features two dedicated belvederes. These elevated points offer panoramic views of the surrounding landscape, including the Étang des Argales and the protected natural zones within the former mining site. They are excellent spots for observation and photography.


Browse the best Hikes in other regions.