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Aargau

Top 20 Lakes in the Aargau

Lakes in the Aargau offer diverse natural beauty and recreational opportunities within the Swiss canton. This region, though not as widely known for its grand lakes as some other parts of Switzerland, features several noteworthy bodies of water. These lakes provide natural landscapes and ecological significance. They are valued for their varied environments, from natural reserves to areas suitable for recreation.

Best lakes in the Aargau

  • The most popular lakes is Egelsee, a lake that is considered idyllic and…

Last updated: August 17, 2026

Flachsee

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Water buffalo also graze here at Flachsee.

I recommend that you take part in a city tour. Bremgarten has a long history and a thousand sights. It's definitely worth it! A first overview bremgarten-tourismus.ch/images/publikationen/Historischer_Stadtrundgang_2017.pdf

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Egelsee

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Legend of Egelsee:
Among the knights who once lived in our land there were many godless and violent people. No traveler on the road, no seed in the field, no …

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Flachsee Nature Reserve

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The Flachsee is a huge nature reserve. Birds can be observed at any time of the year. Right now there's another colony of gray geese here raising their young.

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Lake Egelsee (Bergdietikon)

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Quietly located lake in the middle of the forest, ideal for a short pause and a breath of fresh air. The Egelsee impresses with its natural atmosphere and is a …

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The Klingnau reservoir is an artificially dammed lake in the Swiss canton of Aargau. It is located in the Jura north of the so-called water castle of Switzerland, on the …

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The Klingnau power plant (KRA) is a run-of-river power plant on the Aare, between the Aargau municipalities
Klingnau and Koblenz. The power plant is owned by the stock corporation Aarekraftwerk …

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This route is recommended for everyone who does not want to drive on the main road.

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Hotel and Restaurant Eichberg

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Very beautiful area with a great view of the Seetal and the beautiful Hallwilersee

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The jammed Reuss created a five kilometers long and 350 meters wide lake, which is today a water bird sanctuary. The marshes and islands are a habitat for rare waterfowl. …

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Lakeside Trail at Hallwilersee

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The whole lake round is great. Time flies by, because there is always something to see and the whole Strecker is so varied. We were particularly impressed by the section …

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Ursi Hasler
August 3, 2026, Birdwatching Hide at Flachsee Waterbird Reserve

Here a jetty leads to a bird watching stand. It is a wooden hut on a jetty, with seating facilities to linger and observe birds at the same time.

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Always a great view of the Flachsee, with its diversity of birds. It is also a vast nature reserve that invites you to linger and observe the wildlife. In summer, you often see water buffaloes frolicking in and around the Flachsee.

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Quietly located lake in the middle of the forest, ideal for a short pause and a breath of fresh air. The Egelsee impresses with its natural atmosphere and is a beautiful intermediate point on the tour – a real feel-good spot, especially on warm days.

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Yesterday, through a highly magnified pair of binoculars on one of these islands, I was able to observe five cormorants in close harmony: Magnificent! The birdlife here is truly diverse - a magnifying glass is actually a must. But the photos stored here by Komoot users are also great in this highlight - especially the photo of the kingfisher, which I unfortunately haven't had the chance to see yet...

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Very nice! Especially during sunset.

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Beautiful viewpoint near Eichberg

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Beautiful in any weather…

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The Flachsee is a natural paradise

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Frequently Asked Questions

What are the best lakes in the Aargau for nature observation and wildlife?

The Aargau region offers excellent spots for nature lovers. The Klingnau Reservoir is an artificially dammed lake and a significant nature reserve, known as an important habitat for many bird species. An observation tower provides excellent vantage points for birdwatching. Similarly, the Flachsee is a nature reserve of national importance, rich in biodiversity, including various bird species and even water buffalo. Information boards along its banks introduce visitors to the native and migratory birds.

Are there family-friendly lakes in the Aargau?

Yes, several lakes in the Aargau are well-suited for families. Fünfweiher is particularly popular, offering relaxation potential with ponds, shady spots for picnics, and barbecue facilities. The Klingnau Reservoir also features paths suitable for walks with children and strollers, where you can observe many water birds.

What historical sites can be found near the lakes in Aargau?

Near Lake Hallwil, you can visit the picturesque Hallwyl Castle (Wasserschloss Hallwil), a moated castle situated at the northern end of the lake. This charming historical backdrop adds a cultural dimension to your visit. Additionally, a reconstruction of a lake-dwelling on stilts can be found in Meisterschwanden, near Lake Hallwil.

What kind of hiking trails are available around the lakes?

You'll find a variety of hiking options. Around Lake Hallwil, a scenic walking path winds along its banks, and a circular hike around the lake takes approximately five hours, offering varied scenery. The Flachsee also has a circular hike, just under 8.5 kilometers and mostly flat, taking about two hours. For more hiking opportunities in the region, explore the Easy hikes in the Aargau guide.

Can I go swimming in the lakes of Aargau?

Yes, Lake Hallwil is noted for its clear and warm water, making it inviting for swimming. There are numerous inviting spots along its largely undeveloped banks, and barbecue facilities are available along the wooded riverside promenade.

What are the best lakes for a tranquil and idyllic experience?

Egelsee is considered an idyllic and worthwhile lake to visit, known for its deep, black appearance and recognized for its scenic value and natural appeal, making it a pleasant spot for local recreation and appreciating nature.

Are there cycling routes near the lakes in Aargau?

Yes, the Aargau region offers various cycling opportunities. While specific routes directly around each lake might vary, you can find numerous cycling paths throughout the canton. For a comprehensive overview, check out the Cycling in the Aargau guide, which includes routes like the Freiamt Cycle Path and the Baden moated castle round tour.

What do visitors particularly enjoy about the lakes in Aargau?

Visitors appreciate the diverse natural beauty and recreational opportunities. The Lakeside Trail at Hallwilersee is highly praised for its varied scenery, with sections where the forest reaches the lake shore, creating a unique atmosphere. The opportunity for birdwatching at the Klingnau Reservoir and Flachsee is also a major draw.

How accessible are the lakes by public transport?

Public transport options are generally available to reach the lakes in Aargau. For instance, ferry services are available on Lake Hallwil, which can also be used to shorten the circular hike. Specific details for each lake can be found on local transport websites.

Are there any mountain hiking opportunities near the lakes?

While the lakes themselves are generally in flatter areas, the broader Aargau region offers mountain hiking. You can explore the Mountain Hikes in the Aargau guide for routes like the Rigi Kulm loop or the Wasserflue Via Ferrata, which are within the canton and complement a visit to the lakes.

What is the best time of year to visit the lakes in Aargau?

The lakes in Aargau offer beauty year-round. For swimming and water activities, the warmer months are ideal, especially for Lake Hallwil. Birdwatching at Klingnau Reservoir and Flachsee is excellent throughout the year, as these reserves host both native and migratory bird species.

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Find the best lakes in the Aargau per region:

Bezirk ZurzachBezirk BadenJurapark AargauLake HallwilFlachseeBezirk BremgartenBezirk LaufenburgBezirk LenzburgBezirk RheinfeldenBezirk MuriBezirk ZofingenBezirk AarauBezirk BruggBezirk KulmHallwilersee (AG)

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Still not found your perfect lake in the Aargau? Check out the guides of these regions to see even more beautiful places.

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