Best lakes around Horperath are found in the surrounding Vulkaneifel region, an area known for its volcanic origins. This region features several maars, which are volcanic crater lakes, and other water bodies. These geological formations offer natural beauty and opportunities for outdoor activities. The area provides insights into the region's geological past.
Last updated: April 28, 2026
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The Ulmen Maar lies 420 meters above sea level today, covers an area of 5.5 hectares, and is 36 meters deep. The bubbles at the maar's edge demonstrate that volcanism is still active. They bear witness to a turbulent past—but rest assured, there's no eruption in sight! A wall of various rocks and ash, up to 20 meters thick, surrounds the cone. For those interested, these testimonies to this explosive past are beautifully displayed in St. Matthias Church. This unique wall, with its different colored layers and rounded inclusions, is worth seeing for more than just geologists. The slopes of the maar basin are covered with a beautiful forest, which can be explored on a circular walk. A detour to the medieval castle ruins, from which the Crusaders once launched their campaigns, is recommended. The view from the crater rim over the maar and the Eifel beyond will take your breath away. Whether after a sweaty hike or a long drive, the blue of the Ulmer Eifel lake is all too tempting in summer. However, bathing in the maar is prohibited because it is designated as a nature and water protection area.
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The lower castle has completely disappeared. You can still see the beginning of the ring that connected the lower castle and the Ulmen city wall, a two-story outer wall of the palace, as well as a cistern and some foundation walls of other buildings. The old part of Ulmen Castle was built around 1074 AD and likely rests on the remains of a Roman settlement. In the Middle Ages, Ulmen Castle was further expanded and divided into the upper castle, whose remains of the walls still exist, and the lower castle, which extended to the banks of the maar river. Two knightly families lived in the castle, which is believed to have never been attacked or destroyed until 1673 due to its size. Only the Sun King's troops succeeded. It was rebuilt, but fell again in 1689 during the War of the Succession. However, Ulmen Castle was also rebuilt this time, with only the city wall being abandoned. With the invasion of Napoleon's soldiers, Ulmen also became French and later Prussian. The empty castle, whose last descendant died in 1801, was auctioned to a merchant from Cochem, who sold it as a quarry. When a devastating fire burned Ulmen to the ground in the 19th century, the residents of Ulmen rebuilt their houses with stones from the castle. That's why you can still see a coat of arms on some of the stables today. It wasn't until the early twentieth century that Ulmen Castle was declared a listed building and became the property of the municipality of Ulmen. The castle is always freely accessible.
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The Boos Double Maar consists of two silted-up maars, which today appear as shallow depressions in the terrain. They are located within the municipality of Boos. The two maars formed between 10,150 and 14,160 years ago and belong to the Quaternary volcanic field of the Volcanic Eifel. The two maars form large, circular basins surrounded by tuff embankments. They lie on a west-southwest-east-northeast trend, thus following the Variscan strike of the subsurface. The west-southwest maar has a diameter of approximately 700 m and a depth of between 30 and 60 m; the east-northeast maar is between 650 and 700 m and a depth of between 50 and 87 m. Both depressions are very humid, so there are still areas that have a permanent water surface. The waters were formerly used as fish ponds, but later silted up and served as meadows and fields. Today, there is once again a fish pond in the west-southwestern part of the maar, the Booser Weiher. In the vicinity of the maars, there are tuff pits where the volcanic tuff formed during the eruption of the maars was mined. Very beautiful nature.
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beautiful small reservoir, ideal for a short walk
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The history of the Volcanic Eifel can be explored at the Booser Doppelmaar. The Booser Doppelmaar consists of two silted-up maars, which today appear as flat hollows in the terrain. The two maars were formed between 10,150 and 14,160 years ago. Viewed from above, the two maars are circular basins. The west-southwest maar has a diameter of around 700 m and is between 30 and 60 m deep, the east-northeast maar is between 650 and 700 m large and has a depth of 50 to 87 m. The two hollows are very wet, so there are still places that have a permanent water surface. The water areas were previously used as fish ponds, but later silted up and served as meadows and fields. Today there is again a fish pond in the west-southwestern maar, the Booser Weiher, see also https://de.wikipedia.org/wiki/Booser_Doppelmaar
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The Ulmener Maar is small but beautiful. Located in the middle of the Eifel and in the middle of the city, it is a wonderful destination. You can easily combine a walk around the maar with a walk around the neighboring Jungferweiher. Both have recently been connected by the Ulmener Maar tunnel, which runs under the A 48 motorway.
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The Jungferweiher Maar is located at an altitude of 428 meters, is 1.7 hectares in size and is very shallow and swampy at 80 cm.
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From a wooden bridge there is a wonderful view of the swampy foothills of the rainwater-filled Booser Maar, which is located in the Hohe Acht mountain region and approx. 8 km south of the Hohe Acht. The maar lies in a circular tuff basin, whose tuff walls are covered with swampy meadows and the edge of the bank is overgrown with reeds. Galloways graze in the dry, higher meadows.
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The area around Horperath, particularly the Eifel region, is known for its unique volcanic origins. You'll find several maars (volcanic crater lakes) and other water bodies, offering diverse natural beauty and recreational opportunities.
The Jungfer Pond (also known as Jungferweiher) is a renowned bird sanctuary, especially during migration seasons. It features a 3-kilometer circular path and is home to numerous endangered species and migratory birds. There's also a bird observatory on its western bank.
Yes, the Ulmener Maar is the youngest maar in the Eifel, formed about 10,900 years ago, and features medieval castle ruins on its southern edge. Another significant site is Laacher See, the largest lake in Rhineland-Palatinate, which is a volcanic caldera lake with mofettes (volcanic gas vents) and the historic Maria Laach Abbey on its shore.
The Schalkenmehrener Maar is a popular spot for families, offering swimming in its natural open-air pool and boating in summer. The Gemündener Maar also permits swimming and features an outdoor pool, a large sunbathing area, and boat rentals.
Many lakes offer well-maintained paths. For instance, the Schalkenmehrener Maar is surrounded by a well-maintained cycle path. The Jungfer Pond also has a pleasant circular route, and some sections are noted as wheelchair accessible.
Beyond enjoying the lakes themselves, you can find various outdoor activities. For hiking, consider routes like the 'View of the Jungferweiher – Ulmener Maar Tunnel loop' or 'Mosbruch Pond – View from Hochkelberg loop'. For cycling, there are road cycling routes such as 'Bergkrone Mine Tunnel – Johannes Bridge in Monreal loop' and gravel biking options like 'Ulmener Maar – Ulmener Maar Tunnel loop'. You can find more details on these and other routes in the hiking, road cycling, and gravel biking guides around Horperath.
Fishing is permitted in some lakes. For example, you can fish for pike and carp in the Ulmener Maar, though swimming is prohibited there. The Jungfer Pond also allows fishing from a pier, with permits issued by the local municipal administration in Ulmen.
Yes, many lakes offer stunning views. From the Dronketurm viewpoint, you can enjoy unique panoramic views of both the Gemündener Maar and the neighboring Weinfelder Maar. The crater rim of the Ulmener Maar also provides breathtaking views over the maar and the Eifel landscape.
The Ulmener Maar Tunnel is a 126-meter-long underground connection between the Jungfer Pond and the Ulmener Maar, which opened in 2023. It's a unique feature worth visiting.
Visitors appreciate the unique natural beauty of the volcanic maars and the diverse recreational opportunities. Many enjoy the tranquil walks, birdwatching, and the chance to explore historical sites like castle ruins. The region's lakes are highly rated by the komoot community, with over 900 upvotes and more than 700 photos shared.
Yes, the Heilbachsee is an artificially created lake. It offers a circular route that can also be explored by bike, with various attractions around it.
The lakes offer beauty year-round. Summer is popular for swimming and boating, while spring and autumn are ideal for birdwatching at places like the Jungfer Pond due to migratory birds. Winter can also be beautiful for walks, and some lakes like the Jungferweiher are even suitable for ice skating when conditions allow.


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