Le Grand Large: an artificial lake in the heart of eastern Lyon

The Grand-Large Reservoir, more commonly known as Le Grand Large, is one of the natural gems of eastern Lyon. This 60-hectare artificial lake, located between Décines-Charpieu and Meyzieu, offers an exceptional setting for relaxation and outdoor recreation, just a few kilometers from Lyon.

History and creation of the Grand Large

The origin: the Jonage canal

The Grand-Large Reservoir has its origins in the ambitious Jonage Canal project, which was commissioned in 1897. This ingenious project is based on a dike built below the surrounding hills.

Jonage Hydroelectric Power Station

It is near Décines-Charpieu and Meyzieu that this dike strategically deviates from the line of hills, giving rise to this vast body of water.

A pioneering hydroelectric project

The Jonage Canal is a pioneering example of hydroelectric development along the Rhône. This innovative project established a model that would later be adopted downstream of Lyon, meeting three essential objectives:

• Electricity production to power the Cusset hydroelectric power station in Villeurbanne
• River navigation
• Regulation of river waters

What to do at Grand Large?

Water sports and leisure activities

• Fishing : The lake is renowned for carp, pike and perch fishing.
• Hiking : Marked trails around the lake (4 km circuit)
• Cycling : Cycle paths laid out along the banks
• Nature observation : Rich biodiversity with many bird species

Facilities and services

• Picnic areas
• Free parking
• Trails accessible to people with reduced mobility
• Green spaces for families

Practical information

Access and transport

By car:

• From Lyon: A42 Décines-Charpieu exit (15 minutes)
• Free parking available

By public transport:

• Metro line A to Vaulx-en-Velin La Soie, then bus 57
• Bus C3 from Part-Dieu

Schedules and recommendations

• Free access all year round
• Best time : April to October for outdoor activities
• Recommended : morning for bird watching

Fauna and flora of the Grand Large

Remarkable biodiversity

The site is home to a variety of wildlife:

• Birds : grey herons, cormorants, mallards, coots
• Pisces : carp, pike, perch, roach
• Flora : vegetation typical of wetlands with reeds and willows

Preserved ecosystem

The Grand Large plays an important role in preserving local biodiversity, serving as an ecological corridor between the natural spaces of eastern Lyon.

Tips for your visit

For families

• Children's playground nearby
• Safe and shaded trails
• Bicycle rental available in the surrounding area

For athletes

• Marked running circuit
• Developed fishing spots
• Connection with other routes in eastern Lyon

Seasonal recommendations

• Spring : ideal for observing migratory birds
• Summer : perfect for picnics and water activities
• Autumn : magnificent colors and tranquility
• Winter : contemplative walks and photography

Around the Grand Large

Other sites of interest

• Miribel-Jonage Park (10 minutes)
• Mini Word at the Carré de Soie shopping center (5 minutes)
• Montribloud Castle in Décines (15 minutes)

Accommodation and catering

• Restaurants in Décines-Charpieu and Meyzieu
• Hotels in the Carré de Soie shopping area
• Adapted motorhome areas

Conclusion

Le Grand Large offers an exceptional natural escape just outside Lyon. Whether you're a fishing enthusiast, a nature lover, or simply looking for peace and quiet, this artificial lake will captivate you with its beauty and ecological richness. A must-see for discovering eastern Lyon in a different light.

Want to discover other hidden treasures in Lyon? Check out our other articles on the little-known sites of the Lyon region.