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France
Hauts-De-France
Douai

Rieulay

The best walks and hikes around Rieulay

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.

Best hiking trails around Rieulay

  • The most popular hiking route is Terril des Argales Loop, a 3.0 miles (4.9 km) trail that takes about 1 hour 17 minutes to complete. This route explores the unique mineral landscape of the former mining area.
  • Another top favourite among local hikers is Viewpoint over the lake – Argales Pond loop from Rieulay, an easy 3.2 miles (5.1 km) path. This trail offers views over the artificial lake and its ornithological reserve.
  • Local hikers also love the Terril des Argales Beach loop from Rieulay, a 4.5 miles (7.2 km) trail leading through the Terril des Argales and past the sandy beach area, often completed in about 1 hour 53 minutes.
  • Hiking around Rieulay is defined by its transformed former mining landscape, the flat slag heap of Terril des Argales, and the artificial Étang des Argales with its ornithological reserve. The network offers options for easy and moderate ability levels.
  • The routes in Rieulay are highly rated by the komoot community with an average score of 4.5 stars from more than 300 reviews. More than 1,700 hikers have used komoot to explore Rieulay's varied terrain.

Last updated: May 10, 2026

4.4

(10)

27

hikers

#1.

Terril des Argales Loop

4.88km

01:17

40m

40m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy
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Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Tips from the Community

Pangavert
September 8, 2025, Plage du Terril des Argales

Beautiful walk on a magnificent site

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Great place to run on several routes or hike with the family

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Nice outing

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Alex Fox
August 4, 2024, Lac des Argales

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.

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view of Lake Argales and the surrounding towns, at the highest point without going up very high

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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.

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Artificial beach on the body of water

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Panoramic view of the Rieulay site

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Frequently Asked Questions

What kind of terrain can I expect when hiking in Rieulay?

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.

Are there easy hiking trails suitable for beginners or families in Rieulay?

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.

What are the main natural features or landmarks to see while hiking in Rieulay?

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.

Are there any circular hiking routes in Rieulay?

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.

Can I bring my dog on the hiking trails in Rieulay?

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.

What do other hikers say about the trails in Rieulay?

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.

Are there any moderate hiking trails for a bit more challenge?

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.

Where can I park when visiting the Rieulay hiking trails?

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.

Are there any facilities like cafes or restaurants near the hiking trails in Rieulay?

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.

What is the best time of year to hike in Rieulay?

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.

How long does it typically take to hike around the Étang des Argales?

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.

Are there any specific viewpoints along the trails in Rieulay?

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.

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