Best lakes around Sankt Roman are found in Upper Austria, a region characterized by its Nördliches Granit- und Gneishochland. This area features granite and gneiss uplands, offering natural landscapes for outdoor activities. The nearby Sauwald region further contributes to the natural appeal of the surroundings.
Last updated: May 14, 2026
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Rannasee Dam Austria Germany
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a beautiful reservoir on the border between Germany and Austria
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Great in summer for swimming/lazing around and taking a break
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A leisure nature park was built right next to the monastery, which has a lot to offer, especially for children but also for adults. The tour is designed as a circular tour and you visit three stations of the Engelhartszell Danube World: the "Engelszell Sensory Garden", the "Mini Danube Water Experience" and the "The Aliens Are Coming" exhibition with the large aquarium "Giant of the Danube". In the first station of the Engelhartszell Danube World, the "Mini Danube Water Experience", the Danube can be experienced in a playful way from its source to its mouth in six stations in mini format. There is a reservoir, a Kneipp foot basin, a simple run-of-river power station, a river construction station, a balancing course at the Iron Gate and a cable ferry at the Black Sea. There is also an impressive nine-meter-long wooden model of a "house" that can be climbed. Source: https://www.engelhartszell.at/Wassererlebnis_Mini-Donau
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A wonderful bathing lake that can also be comfortably walked around (on foot or by bike).
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Very nice access along the Ranna below the dam coming from Oberkappel. The last few meters at the dam are steep and challenging due to washed-out gravel channels
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Great tips and information to make you want to visit this place. Thank you for that!
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From below there is a steep hiking trail, then very steep stairs at the top. So absolutely unsuitable for a heavy eBike. There is an alternative descent into the valley at Altenhof/Hochhaus.
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The most popular water bodies in the area are primarily reservoirs. The Ranna Reservoir is highly regarded, featuring the Konzinger Steg — Footbridge and the impressive Ranna Reservoir Dam. Another significant water body is the Ilzstausee Oberilzmühle, located about 18.6 kilometers northwest, offering various recreational activities.
Yes, several options are great for families. The path around the Ranna Reservoir is easy to master and leads along shady paths, making it suitable for walks. Additionally, the Mini Danube Water Adventure Engelhartszell offers a playful experience of the Danube in mini format, with a reservoir, Kneipp basin, and balancing course, ideal for children and adults.
The region around Sankt Roman is characterized by the Nördliches Granit- und Gneishochland, offering natural landscapes. Around the Ranna Reservoir, you'll find scenic views of the lake and surrounding areas like Oberkappel. The Ilzstausee Oberilzmühle is part of the Ilz River valley, known for its nearly natural state, diverse ecosystem, floodplain forests, and granite walls.
The Ranna Reservoir is suitable for swimming and pedal boating. For the Ilzstausee Oberilzmühle, swimming and sunbathing are popular, with fixed and floating jetties for water access. While motorboats are generally restricted, you can organize boat trips on the Ilz River leading to the reservoir, and options exist to rent boats or use personal inflatable boats from upstream points.
Yes, there are several hiking opportunities. The path around the Ranna Reservoir is an easy and pleasant walk. For more extensive options, the area around the Ilzstausee Oberilzmühle is well-suited for hiking, with popular routes leading to the Passau Triftsperre and trails towards Kalteneck/Fischhaus, which are part of longer routes like the Goldsteig and Pandurensteig. You can find more hiking routes in the region by visiting the Hiking around Sankt Roman guide.
The Ranna Reservoir Dam is an impressive man-made monument, built between 1947 and 1950. It stands 50 meters high with a walkable crown 125 meters long. This dam serves as a crucial water reservoir for the Kramesau power plant on the Danube and is also home to many fish. Part of the dam, the Rannasee Dam and the Germany–Austria border, also marks the border between Austria and Bavaria.
Near the Ilzstausee Oberilzmühle, you'll find the "Stausee-Stüberl" (Stausee-Stube) directly at the reservoir, offering a beer garden and Bavarian meals. Further down the Ilz River, the "Wirtshaus zur Triftsperre" also has a beer garden and is reachable via a pleasant 2.5 km walk. The reservoir also provides amenities like changing rooms and free parking.
Visitors particularly enjoy the scenic views from the Konzinger Steg — Footbridge over the Ranna Reservoir, looking out over the lake and Oberkappel. The easy, shady paths around the reservoir are also highly appreciated for walks. The impressive structure of the Ranna Reservoir Dam is another highlight, with its walkable crown offering unique perspectives.
While specific cycling routes directly around the Ranna Reservoir are not detailed, the broader region around Sankt Roman offers gravel biking opportunities. You can explore various routes in the area by checking the Gravel biking around Sankt Roman guide.
The region's lakes and reservoirs are generally enjoyable during warmer months for activities like swimming, sunbathing, and boating. Hiking trails are also best explored from spring to autumn. The St. Roman Arboretum, a nearby natural attraction, is particularly noteworthy for its rhododendrons in May and June, suggesting spring and early summer are beautiful times to visit the wider area.
Yes, the Rannasee Dam is unique as it marks the border between Austria and Bavaria, allowing visitors to stand between two countries. The lake area around it is approximately 3 km, making it suitable for pleasant walks.
Yes, for the Ilzstausee Oberilzmühle, free parking is available near the dam. For the Ranna Reservoir, access points often have parking, though it's advisable to check specific starting points for walks or activities.


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