Lakes around Buttwil offer diverse natural landscapes and recreational opportunities, despite no significant lakes being directly within the municipality. The region is characterized by its proximity to notable bodies of water like Flachsee and Hallwilersee, which are easily accessible. These lakes provide varied experiences, from nationally recognized nature reserves to extensive circular paths for hiking and cycling. The area's natural environment is preserved, with protected reed zones and largely undeveloped shorelines.
Last updated: August 17, 2026
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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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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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The Flachsee is a natural paradise
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Man-made and still nature poor😉
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Beautiful bird viewing point. There are really nice photos early in the morning, as well as in the evening. But you can also see the birds really well during the day.
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Along the Reuss, partly in the shade of the trees, you can easily reach the Flachsee from Bremgarten.
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The Flachsee Nature Reserve is nationally recognized as an important water bird sanctuary, hosting over 212 bird species. It features diverse habitats like mudflats, reed zones, and floodplain forests, making it ideal for birdwatching from a dedicated hide. Beavers also reside here.
Yes, both major lakes offer excellent circular paths. The Lakeside Trail at Hallwilersee is a 22 km path perfect for hiking and cycling, known for its varied scenery. Flachsee also has a circular route of approximately 7 km for walking and cycling.
Near Hallwilersee, you can visit the romantic moated Hallwyl Castle, one of Switzerland's most significant moated castles. It offers a cultural experience with exhibitions detailing the history of a noble Aargau family.
Hallwilersee is excellent for water activities. Numerous bathing beaches around the lake invite visitors to cool off, and many offer a wide range of water sports during the summer months.
Many of the lakes and their surrounding areas are family-friendly. Flachsee and Lake Hallwil are both categorized as family-friendly. The easy circular paths and nature observation opportunities at Flachsee, along with bathing beaches at Hallwilersee, make them suitable for all ages.
The lakes are beautiful year-round. For birdwatching at Flachsee, any time of year offers opportunities. For water sports and bathing at Hallwilersee, the summer months are ideal. The circular paths are enjoyable for hiking and cycling in spring, summer, and autumn.
Hallwilersee offers several dining options, particularly on its eastern shore. Restaurants like Seerose and Delphin are known for their romantic ambiance, especially at sunset, providing an ideal setting for an evening meal.
Hallwilersee gained international attention in 1938 when Sir Malcolm Campbell set a world speed record on its waters in his Bluebird K3 speedboat. Flachsee, an artificial lake formed in 1975, is notable for its nationally important water bird reserve status.
The region around Buttwil offers various outdoor activities. You can find numerous running trails, such as those listed in the Running Trails around Buttwil guide. For cycling, there are routes like the 'Old Church Boswil – View of the Swiss Alps loop' mentioned in the Cycling around Buttwil guide, which can take you through scenic areas near the lakes.
Yes, the Lakeside Trail at Hallwilersee is a popular 22 km path for hiking. Additionally, the Flachsee offers a 7 km circular route. For more extensive hiking options in the broader region, explore the Hiking around Buttwil guide.
For Flachsee, free parking is available at the Rottenschwiler Bridge, providing easy access to the walking paths around the lake. For Lake Hallwil, parking is available, for example, at Hallwyl Castle or other designated spots around the lake.
Cholmoos Pond is a quiet and tranquil forest pond located in a conservation area between Bremgarten and Wohlen. It's a small, natural monument that was once a bog area, offering a peaceful escape into nature.


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