Best lakes in Königsforst are found within a vast 25-square-kilometer forest located east of Cologne, Germany. This expansive woodland serves as a significant natural recreation area, often referred to as "Cologne's green lungs." Within this protected natural area, several tranquil ponds and smaller bodies of water offer serene escapes. The Königsforst features an extensive network of paths, making its lakes accessible for various outdoor activities.
Last updated: June 17, 2026
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The Pionierweiher pond lies hidden in the Königsforst forest east of Cologne, near Forsbach and the Giesbach valley. A short detour to this tranquil body of water in the middle of the woods is well worth it. Standing on the bank, you can watch the dragonflies dancing and listen to a chorus of frogs.
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A true idyll! Yet, this area was a DUMP for toxic sewage sludge until 50 years ago. The 50 m high dam was built over the long-closed Grünewald mine. Behind it, huge amounts of sewage sludge from the LÜDERICH lead and zinc mine, which lay on the other side of the Sülz valley, were finally disposed of. The sludge was pumped into the basin via an 800 m long pipeline across the Sülz valley. The pumping station in the valley can still be seen today. https://de.wikipedia.org/wiki/Grube_Gr%C3%BCnewald Only after the closure of the Lüderich mine in 1978 did the sludge dump fall silent. It was specifically planted with grasses and reeds and allowed to silt up in places. Now it is used by birds as a resting and nesting place, including grey herons. However, only a long-term study can reveal how much heavy metal the birds store in their bodies. Access to the interior is blocked by barriers and signs. A fine of €25-400 could be imposed if you still use the clearly visible footpaths to the photo points. Source: No copy, no AI, explored myself.
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RRaatpilz with a nice view and enough benches
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The pond suddenly appears in the middle of the forest. It invites you to linger for a while, enjoy the silence, observe the wildlife and is a little mysterious.
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No spectacular panoramic views are to be expected on a hike through the Königsforst, but a body of water like this offers a nice little change in the forest. Especially when blue sky and white clouds are reflected on the surface.
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The ponds are former clearing ponds of the Grünewald pit, a non-ferrous metal ore pit in the Bensberg ore district. In 1905 the operation of the pit was stopped and the ponds were left to nature.
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Nice to look at, with nice rest stops around it, even if you can drive around it in a minute.
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For a truly peaceful experience, consider visiting Pionierweiher. This hidden pond near Forsbach offers a serene atmosphere where you can observe dragonflies and listen to frogs. It's ideal for quiet reflection amidst the woods.
Yes, several lakes offer convenient resting spots. Shelter at the Rather Weiher features a covered resting place right by the water, perfect for a break during your hike. Similarly, Kettners Weiher Rest Area provides a nice spot with benches, often adorned with beautiful water lilies.
Many lakes in Königsforst are suitable for families. Kettner's Pond, for instance, has benches for sitting and is easily accessible. The paths around lakes like Rather Weiher are generally easy to navigate, making them pleasant for family walks.
Yes, the lakes offer opportunities for wildlife observation. At Rather Weiher, you might spot Canada Geese, especially in spring. Pionierweiher is known for dancing dragonflies and a chorus of frogs. The area around the silted-up Lüderich mine sewage sludge dump is now used by birds, including grey herons, as a resting and nesting site.
Yes, some lakes have historical significance. Kettner's Pond was created in the 19th century by damming the Wahlbach and is named after royal forester Otto Klein. The area of the Lüderich mine sewage sludge dump was formerly a landfill for toxic sewage sludge from the Lüderich lead and zinc mine, now transformed into a natural habitat.
Königsforst offers a variety of outdoor activities. You can enjoy easy hikes, such as the 'Rather Pond – Shelter at the Rather Weiher loop' or the 'Water-treading spot at the Giesbach loop'. For more options, explore the easy hikes in Königsforst guide. There are also numerous routes for road cycling and gravel biking throughout the forest.
Generally, yes. The paths around lakes like Rather Weiher are considered easy to navigate, suitable for various fitness levels. Königsforst has an extensive network of hiking and cycling trails, including well-fortified hiking and walking trails around areas like Pionierweiher.
Königsforst is generally dog-friendly, with many trails suitable for walks with your canine companion. Pionierweiher is listed as a dog-friendly highlight. Always ensure your dog is on a leash where required and respect local regulations.
The Königsforst lakes offer beauty in every season. Spring is particularly lovely for spotting Canada Geese at Rather Weiher and enjoying fresh greenery. The reflection of blue skies and white clouds on the water is charming, making sunny days pleasant year-round. Autumn brings vibrant colors to the surrounding forest.
While the immediate vicinity of the lakes within the Königsforst nature reserve is primarily natural, the reserve is located near Cologne. You can find cafes, restaurants, and pubs in the surrounding towns and villages, such as Rath/Heumar or Forsbach, which are easily accessible from various points in Königsforst.
Visitors frequently appreciate the tranquil escapes and recreational opportunities offered by the Königsforst lakes. The peaceful atmosphere, opportunities for wildlife observation, and convenient resting spots like those at Rather Weiher and Kettners Weiher Rest Area are highly valued. The komoot community has shared over 240 photos and given more than 1000 upvotes, highlighting the area's natural beauty and appeal.
The lakes in Königsforst are primarily natural ponds and former industrial areas now rewilded. They are generally not designated for swimming. The focus is on enjoying the natural scenery, hiking, and wildlife observation rather than water sports like swimming.


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