Lakes in the Ain

The Ain department, nestled between the Jura Mountains and the Dombes plains, boasts a wealth of stunning natural lakes. These bodies of water offer diverse landscapes, from magnificent glacial mountain lakes and forested wetlands to small valley lakes. They are ideal spots for nature tourism, hiking, mountain biking, fishing, or simply relaxing by the water. Here is a selection of lakes you absolutely shouldn’t miss during your stay in the Ain!

The most famous of all: Lake Nantua!

Lake Nantua is undoubtedly the most iconic lake in the Ain. Of glacial origin, covering 141 hectares, 2.7 kilometers long, 650 meters wide, and 43 meters deep, this gem is located in the heart of the Haut-Bugey region.

Must-Do Hikes and Mountain Bike Trails

All around the lake, there are several very pleasant hiking trails. For example, Visorando offers a 14.78km loop overlooking Nantua and the surrounding forests. Visit Visorando

For a mountain bike ride, the Tour du Lac de Nantua (Mountain Bike/Hiking) is also possible: the Visorando route indicates a 25.74km course with sections of ascent and descent, suitable for cyclists with good endurance. Visit Visorando

Practical Information

Lake Type: Mountain Lake
Address of Nearest Parking: 14 Rue du Lyonnais, 01460 Montréal-la-Cluse
Available Facilities: Restaurant, Watersports Center
Swimming Allowed: Yes
Fishing Allowed: Yes

Tourist Office: Haut Bugey Tourisme

Lake Genin

Lake Genin is a true high-altitude gem in the Haut-Bugey region. Located at an altitude of approximately 830–850 meters, it is often nicknamed the “Little Canada of the Haut-Bugey” due to its forested surroundings, meadows, and tranquility. Classified as a Sensitive Natural Area (ENS), this natural lake is managed to preserve its wild and peaceful atmosphere.

Hiking and mountain biking trails you absolutely must try!
Hiking: A must-do 14.9 km loop trail is available from Auvergne-Rhône-Alpes Tourisme: the route allows you to discover the lake, the surrounding peat bogs, and panoramic views of the fir trees.
Mountain biking: The “VTT 67 vert – Lac Genin et les hauts de Charix” trail (FFC Ain Forestière area) offers an out-and-back ride of approximately 8 km, with a climb through the woods and panoramic views of the lake. plateauderetord.fr
Parking

The main starting point is accessible from Charix, near the Auberge du Lac Genin: parking is available near the inn or in the forest areas. plateauderetord.fr

Tourist Office: Haut-Bugey Tourisme – “Lakes of Haut-Bugey” information sheet ain-tourisme.com

Practical Information

Type of lake: forest lake
Address of Lac Genin: 01130 Oyonnax
Where to park?: on-site parking
Useful Information: Restaurant
Swimming allowed: Yes
Fishing allowed: Yes

Lake Sylans

Lake Sylans is another very interesting natural lake in the Ain department, although less well-known than Nantua or Genin. It is located near the village of Neyrolles and has a rich industrial past with the ruins of old icehouses on its banks.

This calmer lake is ideal for fishing and relaxation. It is classified as a Sensitive Natural Area by Haut-Bugey Tourisme. ain-tourisme.com

Hiking and mountain biking trails not to be missed!

Even though fewer routes are listed, it is possible to connect this lake with walks around the Nantua gorge or via short circuits linking Sylans to neighboring lakes.

Parking

A small parking area is located near the icehouse ruins, on the lake shore, accessible from the departmental road leading to Les Neyrolles. The main access point is popular with visitors to the Sensitive Natural Area.

Tourist Office: Haut-Bugey Tourisme – Haut-Bugey Lakes ain-tourisme.com

Practical Information

Type of lake: small mountain lake
Address of Lake Sylans: 01130 Les Neyrolles
Where to park? Parking available on site
Useful Information: Pets allowed
Swimming allowed: No
Fishing allowed: Yes
The forgotten gems of the Haut-Bugey: our beloved peat bogs!

Beyond the well-known lakes, the Haut-Bugey region is home to other small bodies of water, particularly in the peat bogs around Lake Genin, where meadows, wetlands, and fir forests intertwine. These sensitive natural areas are managed to preserve biodiversity.

These areas offer a true immersion in nature: observe the peat bog plants, listen to the birds, or simply enjoy the tranquility.

Hiking and mountain biking trails you absolutely must try!

The 3 Lakes Hike, organized by the French Alpine Club, includes sections that pass near the Haut-Bugey peat bogs. Valserhône Countryside

This hike offers several routes (14 to 25 km) depending on your level and preferences, with views of Lake Genin, Lake Nantua, and the surrounding ridges.

Parking

The starting point for hikes to the lakes and peat bogs is often the Tourist Office.

From Nantua, located in the town center, or from Charix depending on the chosen route.

Tourist Office: Haut-Bugey Tourisme ain-tourisme.com

Lake Ambléon: Nature and Activities in the Heart of the Bugey

Lake Ambléon, located at an altitude of 712 m in the Bas-Bugey massif (Ain), is a true natural gem. Classified as a Sensitive Natural Area (ENS), it offers a preserved setting where fauna, flora, and wild panoramas combine for unforgettable nature outings. Its circular surface, surrounded by forests and peat bogs, is ideal for relaxation and birdwatching. The local legend of the Vouivre adds a mysterious charm to this exceptional site. (Bugey Sud Tourisme – Lake Ambléon)

Hiking and Mountain Biking Trails You Absolutely Must Do!

Hiking around the lake

To discover the lake and its surroundings, a 6 km hiking trail offers an easy loop on foot, punctuated by viewpoints overlooking the forests and the lake. It’s an accessible walk for the whole family, perfect for enjoying nature and the tranquility of the Bugey region.
Hiking link: Lake Ambléon Hike – WeTrek

Mountain biking trail

Cycling enthusiasts can explore a mountain biking trail that passes by the lake and the Col des Fosses pass, along quiet roads and forest paths. This route combines physical exertion with wild landscapes, offering panoramic views of the lake and the valley.

Mountain biking link: Lake Ambléon Mountain Biking Trail – Bugey Sud

Practical information
Type of lake: forest lake
Address of Lake Ambléon: 01300 Ambléon
Where to park? Parking nearby
Useful Information: Pets allowed
Swimming allowed: No
Fishing allowed: Yes
The Blue Lake and its colors

The Blue Lake is a true natural gem. Its crystal-clear water, ranging from light blue to turquoise, gives it its name and attracts walkers in search of photogenic landscapes.

It’s an ideal starting point or a perfect stop during your hikes in the Ain region. Enjoy the shaded areas around the lake for a refreshing picnic in the heart of nature, while observing the local flora and fauna. The trees that line the lake offer a peaceful and sheltered atmosphere, conducive to relaxation and exploring the most beautiful lakes in the Ain.

Please note, however, that fishing and swimming are prohibited in order to preserve this fragile ecosystem and its exceptional biodiversity. Nevertheless, the trails surrounding the lake invite you to walk and explore, perfect for nature and photography enthusiasts.

Address: Lac Bleu, 01500 Ambérieu-en-Bugey, Ain

More information about the lake and hiking trails: Ambérieu Basin Tourist Office

Suggested hike: From the Grangeons to Lac Bleu

The “Grangeons to Lac Bleu” hike is approximately 8.2 km long, starting from the Brosses parking area, passing through winegrowers’ huts called “grangeons,” and ending at the azure lake.

Hiking link: Pérouges Bugey Tourism

Suggested mountain biking route: Around Lac Bleu

Route: “Mountain biking: Lac Bleu” route from Pérouges to Bugey, a loop around the lake. Pérouges Bugey Tourism

Practical information
Type of lake: Forest lake
Address of Lac Bleu: 01500 Ambérieu-en-Bugey
Where to park? Parking nearby
Useful Information: Pets allowed
Swimming allowed: No
Fishing allowed: No
Practical Advice

What is the best season to enjoy it?

Summer for swimming (Nantua, Genin)
Spring and autumn to enjoy the peace and colors of the Jura mountains
In winter, some hikes around the lakes are possible, particularly around Lake Genin, depending on the weather and your motivation!

And what about parking?

Use the recommended parking areas at the start of the hikes to respect sensitive natural areas (ENS).

Respecting nature is important!
Pick up your trash
Stay on the trails
Respect protected areas (ENS)

Exploring these lakes in the Ain department will reveal a diversity of stunning landscapes: from the glacial waters of Lake Nantua to the forests around Lake Genin, and the peaceful wetlands of Sylans. Each of these lakes is managed by the Haut-Bugey Tourist Office, ensuring respectful access and facilities suitable for everyone.

Enjoy these freshwater gems for hiking, cycling, fishing, swimming, or simply relaxing in an exceptional setting. The lakes of the Ain region are natural treasures to (re)discover in every season!