Lakes in Nationalpark Thy are a defining feature of Denmark's first national park, characterized by a landscape shaped by sea, wind, and sand. The region is home to over 200 dune lakes, many of which are known for their clear freshwater. These lakes often originated as sea bays that became cut off from the North Sea due to land elevation after the last ice age. The area provides a unique natural environment for various plant species and outdoor activities.
Last updated: May 17, 2026
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Popular around Nationalpark Thy
I really enjoyed swimming in it. You could stand anywhere. 😉
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The lake has largely dried up (as of August 2025). Although Danish brochures still advertise it as a swimming spot, swimming is no longer permitted there. However, a picnic table is still there.
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A small, beautifully situated forest lake with a sandy beach and picnic bench. The water was clear. Swimming is permitted, but we didn't test whether it was deep enough.
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Nice place to stay and relax.
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There is a place to rest at the lake. Lots of hiking trails around.
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Beautiful spot. And you can also enjoy swimming there. If the weather is good.
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Complete deceleration is guaranteed
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The lakes in Nationalpark Thy are primarily dune lakes, formed from ancient sea bays that were cut off from the North Sea as the land rose after the last ice age. Many, like Nors Sø and Vandet Sø, are known for their exceptionally clear freshwater and low nutrient levels, supporting unique plant species found almost nowhere else in Denmark. The park is home to over 200 such lakes, offering a distinct natural environment.
Nors Sø is a popular choice for swimming due to its clear waters and available facilities like benches and grills at designated areas. Vandet Sø is also recognized as one of Denmark's purest lakes and is generally excellent for swimming, though it's advised to avoid its eastern end. You can find a dedicated swimming spot at the Lakeside swimming and picnic area with fire pit.
Yes, several lakes and areas are suitable for families. Highlights like Lake Nors, Wooden Dock at Vandet Sø, and the Lakeside swimming and picnic area with fire pit are marked as family-friendly. Nationalpark Thy also offers various activities for families, which you can explore further on their official website: nationalparkthy.dk.
Absolutely. Many lakes, including Per Madsens Kjær, have numerous hiking trails around them. You can find a variety of routes, including easy hikes, in the region. For detailed hiking options, check out the Easy hikes in Nationalpark Thy guide.
Visitors frequently enjoy Per Madsens Kjær, known for its resting spots and hiking trails. Lake Nors is also very popular for its clear waters and unique plant life, making it a favorite for bathing. The Lakeside swimming and picnic area with fire pit is another well-loved spot for groups and swimming.
The low nutrient levels in lakes like Nors Sø and Vandet Sø support distinctive and rare aquatic plant species. The surrounding areas are part of a national park, so you might encounter various bird species. Notably, the area around Nors Sø was where the first wolf in Denmark in over 200 years was photographed in 2012, indicating a rich natural environment.
Yes, some lakes offer facilities for visitors. For instance, the Lakeside swimming and picnic area with fire pit provides space for groups, a fire pit, and an entrance for swimming. The Wooden Dock at Vandet Sø also features a beautiful picnic area and a wooden walkway.
The best time to visit depends on your preferred activities. For swimming and enjoying the outdoors, the warmer months from late spring to early autumn (May to September) are ideal. Birdwatching can be excellent during migration seasons in spring and autumn. The unique landscape offers beauty year-round, but facilities and weather conditions are most favorable in summer.
Yes, Nationalpark Thy offers various cycling and mountain biking opportunities. You can find routes like the 'Panorama Route 410: Experience the Forces of Nature' for touring bicycles or the 'Vilsbøl Klitplantage loop' for mountain biking. Explore more options in the Cycling in Nationalpark Thy guide and the MTB Trails in Nationalpark Thy guide.
While specific public transport routes directly to every lake might be limited, the Nationalpark Thy area is served by regional buses. Planning your trip in advance and checking local bus schedules is recommended. For detailed information on reaching the park, you may consult the official Nationalpark Thy website: nationalparkthy.dk.
Yes, both Nors Sø and Vandet Sø are renowned for their exceptional water clarity. Vandet Sø, in particular, is recognized as one of the purest lakes in Denmark, with visibility often extending up to seven meters. This clarity is due to their origin as karst lakes with low nutrient content.
Many of the lakes are surrounded by accessible trails. For example, Per Madsens Kjær offers numerous hiking trails suitable for various skill levels. You can find a selection of easy walks and hikes in the Easy hikes in Nationalpark Thy guide, which includes routes like the 'Tved Klitplantage loop'.


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