Best lakes around Kalltalsperre are found in the Eifel region of North Rhine-Westphalia, Germany. The Kalltalsperre is a significant drinking water reservoir, nestled within scenic forests. Its primary purpose as a drinking water source means swimming and water sports are prohibited to maintain water quality. The area is popular for hiking and cycling, with a circular route of approximately 6-7 kilometers around the reservoir.
Last updated: October 11, 2026
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The Hohes Venn-Eifel Nature Park contains several reservoirs and dams that regulate the rivers and streams in the Eifel region. These reservoirs, such as the Rurtalsperre Schwammenauel, Urfttalsperre, and other smaller dams, were constructed to control water levels, supply drinking water, prevent flooding, and in some cases, generate electricity from the water flow. Water release valves (also called sluice gates or valves) are technical components in dams and reservoirs that allow operators to control the release or flush of water, thus regulating the water level in the reservoir. Without these valves, water would only flow downward via overflows and natural outflows, which can lead to dangerous water levels in the event of excessive rainfall. In large dams like the Rurtalsperre Schwammenauel, these valves are part of a complex system of pipes and control houses. At the bottom of the dam, large steel pipes typically contain multiple valves (e.g., butterfly valves or special release valves) that allow large volumes of water to be released from the reservoir in a controlled manner. These valves can be mechanically or electrically operated and are a vital link in the lake's management. The valves themselves are robust, large mechanical structures specifically designed to withstand high water pressure and tens of thousands of cubic meters of water. Large dams incorporate multiple valves to enable various water management scenarios, from slow release during light rain to rapid release during extreme weather. Dams like the Rur Dam (Schwammenauel), for example, use butterfly valves and special release valves in the dam's bottom outlets. These components allow for the controlled release of water from the reservoir's depths, while also serving to discharge sediment and limit erosion in the downstream channel. In the Hohes Venn-Eifel Nature Park, these water management systems are embedded in a landscape where nature, recreation, and water management converge. The reservoirs and their release valves not only help protect the region from flood risk but also support the ecological balance of river valleys and provide peaceful recreational areas for hikers and cyclists.
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The last section of the main road can be swapped for a dirt road. After a few meters along the road, take the first left.
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The circular path around the Kalltalsperre is very well developed and surrounded by an impressive rock and forest landscape. Whether you are hiking or cycling, the Kalltalsperre is always a worthwhile destination. The northern side is easily navigable gravel, the southern side is perfectly asphalted. It is always an experience to cycle through this wonderful nature.
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You can really only recommend the section. The slightly steeper sections (directly on the lake) can be mastered.
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The Kalltalsperre, together with the Rurtalsperre and the Dreilägerbachtalsperre, is responsible for the drinking water supply of the Städteregion. Anyone who wants to know more can read about it on the website provided below https://eifelfuehrer.de/touristische-ziele/stauseen/kalltalsperre.html
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beautiful circular route, also good for jogging (5km circular route)
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Wonderfully idyllic, with many small streams nearby which invite the dogs to splash around. In contrast to other lakes and dams, it is not so "crowded" when the hiking weather is nice.
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The Kalltalsperre area is ideal for hiking and cycling. A popular circular route of approximately 6-7 kilometers encircles the reservoir, offering scenic views. You can find various routes for different sports, including hiking, mountain hikes, and gravel biking.
Yes, the area offers several impressive sights. You can get a great overview of the reservoir from Kall Reservoir, which also provides views of the flood relief. Another spectacular spot is the View of the Urft Dam Spillway, offering wide panoramas of Urft Lake and the Eifel National Park. The tranquil environment is also excellent for observing local wildlife and impressive rock formations like the Kaiserfelsen.
No, swimming and water sports are strictly prohibited in Kalltalsperre. It is a significant drinking water reservoir, and these activities are not allowed to maintain water quality. For recreational water activities, you might consider other lakes in the broader region, such as Badesee Echtz, which is about 20 kilometers away.
The Kalltalsperre offers beautiful natural surroundings throughout the year. Spring and summer bring lush greenery, autumn showcases vibrant colors, and winter provides tranquil, scenic views. The circular hiking route is generally easy to navigate, making it suitable for a visit in most seasons.
Yes, the circular route around the reservoir is generally easy to navigate and suitable for a half-day excursion, making it family-friendly. Many trails in the Eifel region are also dog-friendly, but always ensure your dog is on a leash and you clean up after them.
The Kalltalsperre dam, an impressive earth dam, was built in 1934. It stands 34 meters high and stretches 180 meters across its crest. Its construction was part of a government employment program in the 1930s, and it remains a notable engineering feat. You can also see technical components like the Water Outlet Valves at Hohes Venn-Eifel Nature Park and the Water Intake Tower at the Head of the Kallstollen, which are vital for water regulation and supply.
Kalltalsperre is easily accessible on foot or by bicycle. A common starting point is the 'Kallbrück' hikers' car park. Various hiking trails also lead to the reservoir from nearby towns like Lammersdorf, Rollesbroich, or Simonskall.
Visitors particularly appreciate the scenic beauty and tranquility of the area, especially the well-maintained circular path around the reservoir. The impressive views from spots like the Urft Dam Spillway and the opportunity for peaceful nature observation are also highly valued.
While the main circular route around Kalltalsperre is generally easy, there are more challenging options in the wider region. For instance, the route 'Simonskall – View of Simonskall loop from Schluchtwald Kalltal' is rated as difficult. You can explore various hiking guides for routes with different difficulty levels.
While Kalltalsperre is primarily for drinking water, other bodies of water in the broader region like Dreilägerbachtalsperre, Eiserbachsee, and Obersee offer different experiences. For swimming and recreational activities, Badesee Echtz is a worthwhile alternative approximately 20 kilometers away.
The tranquil environment of Kalltalsperre makes it an excellent spot for nature observation. You might encounter local wildlife such as deer, foxes, and a variety of bird species common to the Eifel region.


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