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France
Hauts-De-France
Lille
Willems

Bonniers Loop Trail

Moderate

4.3

(74)

222

hikers

Bonniers Loop Trail

03:41

14.5km

40m

Hiking

Hike the 9.0-mile Lac du Héron loop from Willems, a moderate route through a nature reserve with lake views and wildlife spotting.

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Réserve naturelle du Héron

Waypoints

A

Start point

Parking

Get Directions

1

1.82 km

6 Bonniers Park

Highlight • Other

A park in the middle of nature conducive to a serene run.

Translated by Google •

Tip by

2

4.08 km

Véloroute paris roubaix

Highlight • Trail

Cycling and walking route

Translated by Google •

Tip by

3

7.44 km

Beautiful area. Very easy to go around the lake of the heron. Beautiful wildlife

Translated by Google •

Tip by

4

8.42 km

Heron Lake

Highlight • Lake

One of the most beautiful places to walk in the Lille Metropolis

Translated by Google •

Tip by

B

14.5 km

End point

Parking

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Way Types & Surfaces

Way Types

6.48 km

4.08 km

1.92 km

1.51 km

507 m

Surfaces

7.31 km

2.68 km

1.54 km

1.44 km

1.11 km

401 m

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Elevation

Elevation

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Weather

Powered by Foreca

Saturday 6 June

19°C

12°C

17 %

Additional weather tips

Max wind speed: 19.0 km/h

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Comments

May 12, 2024,Lac du Héron — boucle depuis Willems dans la réserve naturelle du Héron
Be careful, the path for the last km no longer exists. From rue du Marais, take the small Chemin du Bon Conseil.

Showing Translation

There's a section across the fields, two lanes of about a kilometer. This is located on a small section just before the end. You can adjust the walk by following the asphalt road for the last kilometer.

Showing Translation

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Frequently Asked Questions

Where can I park to access the Lac du Héron loop trail from Willems?

While the trail starts from Willems, the research indicates that the Parc du Héron has undergone recent renovations, including improvements to accessibility. It's advisable to look for designated parking areas near the main entrances of the Parc du Héron or in Willems itself, which is the starting point for this loop. Specific parking details are not provided, but generally, nature reserves offer visitor parking.

Is the Lac du Héron — loop from Willems in the Héron nature reserve dog-friendly?

The Héron nature reserve is a protected area known for its rich biodiversity. While many nature reserves allow dogs on leash, specific regulations for this particular reserve are not detailed. It's always best to check local signage upon arrival or the official website for the Réserve Naturelle du Héron to confirm their current dog policy and leash requirements.

Do I need a permit or pay an entrance fee to hike in the Réserve Naturelle du Héron?

The Réserve Naturenelle du Héron, which encompasses a large part of the Parc du Héron, is a regional nature reserve. The provided information does not mention any specific permits or entrance fees required for hiking the trails within the reserve. Access to natural parks in France is often free, but it's always good practice to check for any updates on the official park website before your visit.

What is the best time of year to hike the Lac du Héron loop?

The trail offers diverse scenery throughout the year. Spring and autumn are generally ideal for hiking, with pleasant temperatures and vibrant natural colors. Spring brings blooming flora, while autumn showcases beautiful foliage. The reserve is also known for birdwatching, which can be excellent during migration seasons. Summer is also suitable, but be prepared for potentially warmer weather. Winter hiking is possible, but some paths might be muddy or slippery.

What kind of terrain can I expect on this loop trail?

The terrain on this loop is varied, contributing to its moderate difficulty. You'll encounter a mix of gravel and asphalt paths, as well as unpaved and natural sections. There's even a small band of cobblestones along the route. The elevation changes are minimal, making for a generally accessible walk despite the varied surfaces.

What wildlife can I spot along the Lac du Héron loop?

The Réserve Naturelle du Héron is renowned for its rich biodiversity, especially for birdwatching. You can frequently spot various species such as ducks, geese, herons, and kingfishers. Birdwatching walls are available for observation. The reserve protects diverse wildlife habitats, so keep an eye out for other local flora and fauna.

Are there any notable points of interest or landmarks along the route?

Yes, the loop offers several interesting features. You'll hike along the Marque River and encircle the beautiful Heron Lake. The route also passes through the 6 Bonniers Park and woodland areas like the Dix Sept Bonniers woodland. Historically, the park hosts the Asnapio archaeological park and a 17th-century hunting lodge, adding cultural interest to your hike.

Does this trail intersect with other hiking or cycling routes?

Yes, the Lac du Héron loop from Willems intersects with several other routes. Notably, it covers significant sections of the RV6 Picardie - Ardennes : Lille-Tournai and the Boucle des Bonniers. You'll also find parts of the Véloroute du Paris-Roubaix, De Bailleul à Rieulay, and various local paths like Chemin du Grand Marais and Allée des Frênes.

Are there facilities like restrooms or picnic areas available on the trail?

Yes, recent renovations in the Parc du Héron have included improvements to visitor amenities. You can expect to find improved restrooms, pontoons, walkways, and the installation of new benches and picnic tables along the route, enhancing your hiking experience.

Is the Lac du Héron loop suitable for families with children?

The trail is described as having easily accessible paths and minimal elevation changes, making it suitable for various skill levels. While it's a moderate hike requiring good fitness, the presence of amenities like picnic tables and the diverse scenery, including birdwatching opportunities, can make it an enjoyable experience for families. Consider the full distance of approximately 14.5 km when planning with younger children.

Are there any cafes or restaurants near the trailhead in Willems?

The provided information focuses on the trail itself and the nature reserve. However, as Willems is the starting point for this loop, it's reasonable to expect that you can find local cafes, pubs, or restaurants within the village or nearby. It's always a good idea to check local listings or maps for current options before your visit.

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