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Switzerland
Graubünden

Plessur

Top 15 Lakes in Plessur

Best lakes in Plessur are found within the Graubünden canton of Switzerland, a region characterized by its alpine landscape. The district encompasses the popular resort town of Arosa, home to several notable lakes. The area is known for its diverse natural features, including mountain lakes and trails. Visitors can explore a variety of aquatic environments, from accessible village lakes to more secluded alpine bodies of water.

Best lakes in Plessur

  • The most popular lakes is Upper Lake (Arosa), a…

Last updated: May 3, 2026

Upper Lake (Arosa)

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Right at the Arosa train station. Discover the lake on a pedalo. With the Arosa Card, it's even free.

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Trail above Schwellisee

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A cool S1 trail with a breathtaking, high alpine view of the Schwellisee. There are no trees at this altitude (2,000 meters!), but there is plenty of welcome mountain solitude and panoramic views.

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Urdensee

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The trail from Hörnli to Lake Urden is not easy at the top (S3). The closer you get to the lake, the easier it becomes. Still, it's best to admire …

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Untersee (Lower Lake)

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Here you can relax in the tranquility of nature while enjoying the view of the turquoise waters and the surrounding mountains. 🏔️ You can go swimming at the lido, but …

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Älplisee

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Clear mountain lake, shimmering in green and blue.

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Arosa Reservoir Dam

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The Isel Reservoir, also known as the Arosa Reservoir or Iselsee, has been dammed since 1897. Initially, the dam wall was only two and a half meters high; after several …

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Grüenseeli

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A crystal-clear, mysterious mountain lake, in the sight of which you can easily lose yourself for a while.

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Heidbüel

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Heidbüel is located above Churwald. A modern cable car with large panoramic windows connects the two places. Right next to the cable car station is an artificial but nevertheless very …

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Obersee

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There is a path that leads completely around the lake. You will also find beautiful meadows and cozy benches to relax on the shore. A break at the lake is …

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Former climatic health resort with around 3,000 inhabitants. Very high at 1,700 meters. And if you look at the climate table, it's probably more suitable for winter. Warm summer days are rare. We were lucky (July 29 to 31, 2024).

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Tips from the Community

Go Bike Yourself
September 18, 2025, Trail Above Schwellisee

The view of the Schwellisee is breathtaking. Two paths lead there by bike. From Gredigs Fürggli via the Älplisee Trail or from the Hörnligrat via the Schwellisee Trail. https://youtu.be/ZSADGyXU3HQ?si=20Pzz2pXKv2iRwmN&t=973

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Silvano Turati
August 15, 2025, Urdensee

It's a shame that it's impossible to cycle around the lake properly. The cows have made the path along the shore impossible to walk comfortably... what a shame.

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Pat
June 20, 2025, Untersee

ideal cooling off after the hike; and there is also something to eat in the restaurant

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Claudia
June 15, 2025, Obersee Arosa

A visit to Arosa is worthwhile at any time of year; in summer the lake is very beautiful to look at, but in winter it is frozen over.

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Mattia Pastore
March 20, 2025, Urdensee

The trail from Hörnli to Lake Urden is not easy at the top (S3). The closer you get to the lake, the easier it becomes. Still, it's best to admire this beautiful mountain lake with at least one shoe on the ground.

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The Isel Reservoir, also known as the Arosa Reservoir or Iselsee, has been dammed since 1897. Initially, the dam wall was only two and a half meters high; after several elevations, it is now around twelve meters high. The electricity generated here covers the equivalent of the needs of approximately 2,500 households.

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Beautiful lake which is frozen in winter.

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Ralph
August 17, 2024, Untersee

The Untersee is the smaller and lower-lying of the two lakes located in the middle of the Arosa settlement area. Its name derives from this fact. The sister lake at 1734 m is the Obersee, with which it was previously directly connected via the Mittelbach.

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Frequently Asked Questions

What are some popular lakes in the Plessur region for visitors?

Visitors frequently enjoy the Upper Lake (Arosa), which is centrally located and offers activities like pedalo boating. Another favorite is Älplisee, known for its clear, shimmering green and blue water, inviting visitors to cool off.

Are there family-friendly lakes in Plessur?

Yes, several lakes in the Plessur region are well-suited for families. The Upper Lake (Arosa) and Untersee (Lower Lake) in Arosa are both family-friendly, offering facilities and activities. Additionally, the Arosa Reservoir Dam and Grüenseeli are also noted as family-friendly spots.

What kind of activities can I do at the lakes in Plessur?

The lakes offer a variety of activities. At Upper Lake (Arosa), you can enjoy rowing and paddle boats in summer, and it hosts winter events like horse races on snow. Lake Cauma, though near Plessur, is excellent for swimming, sunbathing, and pedal boat rentals. Lake Cresta is perfect for swimming, paddleboarding, and rowing in its pristine waters.

What natural features can I expect to see around the lakes?

The Plessur region's lakes are set in an alpine landscape. You'll find crystal-clear waters, dense forests, and panoramic mountain views. Lakes like Älplisee and Urdensee are clear mountain lakes. Lake Cauma is famous for its turquoise-green water and a wooded island, while Lake Cresta is nestled between dark fir trees with exceptionally clear, blue-green water.

Are there opportunities for swimming in the Plessur lakes?

Yes, many lakes offer excellent swimming opportunities. The Untersee (Lower Lake) in Arosa is suitable for swimming. Lake Cauma, near Plessur, is particularly popular for swimming due to its surprisingly warm water (up to 24°C in summer). Lake Cresta also boasts crystal-clear, warm water perfect for a dip.

Can I go hiking or cycling near the lakes in Plessur?

Absolutely. The region offers numerous trails. For hiking, you can explore the area around Urdensee or enjoy the scenic Lake walk. Mountain biking is also popular, with trails like the Trail above Schwellisee. You can find more detailed routes for cycling and mountain biking in the Cycling in Plessur and MTB Trails in Plessur guides.

How accessible are the lakes in Plessur by public transport or car?

Accessibility varies by lake. The Upper Lake (Arosa) is very accessible, located right next to the Arosa train station with nearby parking. Lake Cauma is accessible by a funicular from Flims Waldhaus. Lake Cresta is primarily accessed on foot via hiking trails, contributing to its peaceful ambiance.

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

The best time largely depends on your desired activities. Summer (June to September) is ideal for swimming, boating, and hiking, with warmer temperatures. Lakes like Cauma and Cresta reach pleasant swimming temperatures. Winter offers unique experiences, especially at Upper Lake (Arosa), which hosts events on its frozen surface.

What makes Lake Cauma special?

Lake Cauma, often called the 'pearl of Flims,' is renowned for its intense turquoise-green, crystal-clear water, which can reach up to 24°C in summer due to underground springs. It features a wooded island and is surrounded by dense forests, offering a tranquil atmosphere perfect for relaxation and swimming. Its water level also fluctuates seasonally, a unique natural phenomenon.

What can I expect at Lake Cresta?

Lake Cresta offers a serene and authentic natural experience. This spring-fed lake boasts crystal-clear, blue-green water nestled between dark fir trees. It's a protected natural monument with exceptional water quality, suitable for swimming, paddleboarding, and rowing. A restaurant and boat rental are available during the summer season, and its primary access by hiking trail ensures a peaceful visit.

Are there challenging trails around the Plessur lakes?

Yes, for those seeking more challenging routes, the region offers options. The Trail above Schwellisee is described as a cool S1 trail with breathtaking alpine views, including some S2 and short S3 sections for mountain bikers. Hiking to mountain lakes like Älplisee can also involve intermediate to difficult terrain, requiring sure-footedness and good mountain boots.

What do komoot users particularly enjoy about the lakes in Plessur?

Komoot users appreciate the clear, shimmering waters of lakes like Älplisee, which many find inviting for a cool-off. The scenic views, especially from trails like the Trail above Schwellisee, are highly valued. Many also enjoy the peaceful atmosphere and the opportunity to relax by the water, as noted for Obersee.

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Find the best lakes in Plessur per region:

ChurTschiertschen-PradenTschiertschenMaladersChurwaldenArosa

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