47
hikers
3
hikes
Mountaineering in Osterseen is characterized by a unique ice-age landscape featuring a chain of 19 to 24 interconnected lakes, surrounded by extensive mixed forests and significant moorland areas. The terrain consists of rolling hills and gentle ascents, offering routes that traverse diverse habitats, including riparian zones and ancient forests. While not a destination for high-altitude climbing, the region provides expansive views of the distant Bavarian Alps, including the Zugspitze, on clear days.
Last updated: May 23, 2026
28
hikers
Moderate mountaineering route. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
3
hikers
4.48km
01:10
30m
30m
Easy mountaineering route. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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14
hikers
Moderate mountaineering route. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
2
hikers
10.8km
02:50
90m
90m
Moderate mountaineering route. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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Great trail above the Riegsee, with a beautiful view of the Alps
2
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Beautiful spot for swimming at Riegsee
1
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Good view over the lake and the mountains
1
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Beautiful view from the campsite over the Riegsee to the mountains
2
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Beautiful view from the north side of Lake Fohnsee over the lake and Iffeldorf.
1
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A nice little path here – and with a good viewpoint. The path feels more like a footpath – but I didn't encounter any hostility from the walkers on my bike.
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The Osterseen region features a unique ice-age landscape with rolling hills and gentle ascents. Routes traverse diverse habitats, including extensive moorlands, mixed forests, and riparian zones around the chain of 19 to 24 interconnected lakes. While not high-altitude climbing, you'll find varied paths through this protected natural environment.
Yes, Osterseen offers routes suitable for beginners. For example, the Fohnsee reedbed – Fohnsee - panoramic view loop from Iffeldorf is an easy 4.5 km path that provides panoramic views of Fohnsee and its surrounding reedbeds.
The duration of routes in Osterseen varies. An easy route like the Fohnsee reedbed – Fohnsee - panoramic view loop from Iffeldorf can take around 1 hour 10 minutes. Moderate routes, such as the View of Großer Ostersee – Fohnsee reedbed loop from Iffeldorf, typically take about 2 hours 52 minutes for 11 km.
The region is rich in natural beauty. You can explore the unique chain of 19 to 24 interconnected, groundwater-fed lakes, extensive moorlands, and mixed forests. A notable natural feature is the Blue Gumpe Spring (Osterseen), a spring funnel south of the Großer Ostersee where groundwater emerges.
Yes, many routes offer scenic views. On clear days, you can enjoy breathtaking panoramic views of the distant Bavarian Alps, including Germany's highest mountain, the Zugspitze. Specific viewpoints include the View of the Fohnsee and the View of Marien Island from the leaning tree (Großer Ostersee).
The lakes in the Osterseen region are popular for swimming during warmer months. Many trails wind along the lakeshores, providing numerous idyllic rest and swimming opportunities in the strikingly clear, turquoise-blue water.
Yes, the Osterseen region is well-suited for families. The trails are generally easy to moderate, with gentle ascents, making them accessible for all skill levels. The unique ice-age lake landscape and diverse forests offer an engaging environment for children and adults alike.
As a nature reserve, dogs are generally permitted on trails in Osterseen, but they must be kept on a leash to protect wildlife and ensure the safety of other visitors. Always clean up after your dog.
The Osterseen region is beautiful year-round. Spring and autumn offer pleasant temperatures and vibrant scenery, while summer is ideal for combining hiking with swimming in the lakes. In colder periods, the smaller lakes can even be used for ice skating, though winter mountaineering conditions should always be checked.
Yes, many routes in Osterseen are circular, allowing you to start and end at the same point. Examples include the View of Großer Ostersee – Fohnsee reedbed loop from Iffeldorf and the Great Ostersee – View of the Ameissee and the moorland loop from Schwaigerinsel.
Beyond the natural beauty of the lakes and moorlands, you can find several points of interest. The Great Ostersee is the largest lake, and the Blue Gumpe Spring (Osterseen) is a unique natural monument. You can also enjoy views of the Fohnsee and its surrounding reedbeds.


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