Top 20 Natural Monuments around Iffeldorf
Natural monuments around Iffeldorf are characterized by an ice disintegration landscape, shaped by the last Ice Age. This region in Upper Bavaria features a chain of interconnected lakes, moor landscapes, and forests. The area is known for its geological significance and rich biodiversity, including various bird and reptile species. It offers a blend of natural features for exploration.
Best natural monuments around Iffeldorf
- The most popular natural monuments is Great Ostersee, a lake that is the largest of the…
Last updated: July 7, 2026
Great Ostersee
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Benediktbeuren moor landscape
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Bernrieder Park Lakeside Trail
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Blue Gumpe Spring (Osterseen)
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Along the Osterseen
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beautiful gravel road away from traffic
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beautiful path with great views over the landscape
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Beautiful dirt road through a great landscape
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Really nice paths for cycling here.
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The Osterseen are a group of bodies of water south of Lake Starnberg in the Weilheim-Schongau district in Upper Bavaria. The southern and central Osterseen with the Großer Ostersee belong to the municipality of Iffeldorf, the northern Osterseen from the Stechsee and the Frechensee to the municipality of Seeshaupt. Iffeldorf is around five kilometers by road northwest of Penzberg, 20 km southeast of the district town of Weilheim and 50 km south-southwest of Munich city centre. The 20 larger individual lakes have a total area of around 225 hectares and an average depth of a good nine metres. The Kleiner Gröbensee and about 15 unnamed smaller lakes, each with an area of only a few hundred square meters, are not included here, seven of which are already heavily silted up. The Osterseen and the silting-up zone bordering to the west are located in the landscape protection area "Protection of the Osterseen and their surroundings in the communities of Frauenrain, Iffeldorf and Seeshaupt". The area received this protection status as early as 1955. Since 1981 there has also been the Osterseen nature reserve with an area of 1,083 hectares. About a third of this is on the surface of the water bodies, 494 hectares are high, low and intermediate moors, 172 hectares consist of semi-natural mixed forest. Around five percent of the Osterseen landscape consists of riparian regions, silted-up areas and meadows. The nature reserve is divided into three parts, which are separated from each other by the train line of the Kochelseebahn and the state road 2063: Südliche Osterseen, Nordliche Osterseen and Frechensee. In May 1997, the Osterseen were reported to Brussels as a SPA (European bird sanctuary) and FFH area according to the Fauna-Flora-Habitat Directive. In addition to the Eggstätt-Hemhofer lake district and the Seeoner lakes, the area is the largest and most structured icefall landscape in the Bavarian Alpine foothills. The complex of boggy and nutrient-poor lakes, low, transitional and raised bogs alongside bog and swamp forests with its extraordinary diversity of species in the networked habitats, biotopes and ecological niches is of Europe-wide importance for basic scientific research. The beauty of this landscape has always attracted artists. The painter Georg Schrimpf in particular, a main representative of the New Objectivity art movement, created several oil paintings of the Osterseen in the 1930s. Source: https://de.wikipedia.org/wiki/Osterseen
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Bavarian State Office for the Environment (Osterseen Icefall Landscape): https://www.lfu.bayern.de/geologie/bayerns_schoenste_geotope/33/index.htm https://www.lfu.bayern.de/geologie/bayerns_schoenste_geotope/33/doc/33_schautafel.pdf “The Blue Pump The Osterseen are mainly fed by groundwater, which emerges in numerous spring funnels. The best known is the Blaue Gumpe south of the Großer Ostersee. The walls of its spring funnel are covered with white deposits of freshwater lime, which is excreted from the lime-rich spring water. Since the groundwater has a relatively constant temperature of 10°C, the water surface does not freeze in winter. Steam hangs over the spring on cold winter days.” Bank 51 is nearby.
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Bavarian State Office for the Environment (Osterseen Icefall Landscape): https://www.lfu.bayern.de/geologie/bayerns_schoenste_geotope/33/index.htm https://www.lfu.bayern.de/geologie/bayerns_schoenste_geotope/33/doc/33_schautafel.pdf “The Blue Pump The Osterseen are mainly fed by groundwater, which emerges in numerous spring funnels. The best known is the Blaue Gumpe south of the Großer Ostersee. The walls of its spring funnel are covered with white deposits of freshwater lime, which is excreted from the lime-rich spring water. Since the groundwater has a relatively constant temperature of 10°C, the water surface does not freeze in winter. Steam hangs over the spring on cold winter days.” Bank 51 is nearby.
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Here in the foothills of the Alps you can enjoy nature carefree. The cycle paths far away from the major auto routes are in good condition.
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Frequently Asked Questions
What are the most significant natural features to explore around Iffeldorf?
The Iffeldorf region is primarily defined by its unique ice disintegration landscape, a result of the last Ice Age. The most significant natural features are the interconnected Osterseen lakes, known for their geological importance and rich biodiversity. You can also discover the fascinating Blue Gumpe Spring, where calcareous groundwater emerges, feeding the lakes.
Are there family-friendly natural monuments or activities in the Iffeldorf area?
Yes, several natural monuments around Iffeldorf are excellent for families. The Great Ostersee area is a fantastic hiking spot with easy paths suitable for all ages. You can also enjoy a family-friendly circular route through the Benediktbeuren moor landscape, which is about 23 km long and offers a chance to discover diverse flora and fauna.
What kind of wildlife can I expect to see near the natural monuments in Iffeldorf?
The natural monuments, especially around the Osterseen, are rich in biodiversity. The area is home to a diverse range of bird species, including green and great spotted woodpeckers and great crested grebes. The reed beds host marsh warblers. You might also spot four reptile species, such as the slow worm, sand lizard, common lizard, and the common adder. It's advisable to stay on official paths due to the presence of adders and the sensitivity of the moor areas.
What is the best time of year to visit the natural monuments around Iffeldorf?
The Osterseen region offers beauty throughout the year. Spring and summer are ideal for enjoying the lush greenery, birdwatching, and recreational activities around the lakes. Autumn brings vibrant colors to the forests, while winter offers a serene, quiet landscape, though some paths might be icy. For photography, the morning or evening light around the Blue Gumpe Spring is particularly recommended when the lake is calm.
Are there hiking trails near the natural monuments in Iffeldorf?
Absolutely. The Osterseen area is renowned as a fantastic hiking destination. There are numerous trails of varying lengths and difficulty levels, including the popular Osterseen circular tour which starts conveniently from Iffeldorf railway station. For more options, you can explore various Mountain Hikes around Iffeldorf, some of which offer views of the Great Ostersee.
What other outdoor activities can I do near the natural monuments in Iffeldorf?
Beyond hiking, the region around Iffeldorf offers diverse outdoor activities. You can find numerous MTB Trails around Iffeldorf, with routes like the 'View of Großer Ostersee' loop. For road cyclists, there are scenic Road Cycling Routes around Iffeldorf, including tours that pass through the village center and offer views of the Walchensee.
Is there a natural monument around Iffeldorf that offers scenic views?
Yes, the Bernrieder Park Lakeside Trail offers beautiful views of Lake Starnberg. While not directly in Iffeldorf, it's a nearby natural monument that provides picturesque vistas along its more than 1.5 km long lakeshore, with numerous benches and small bays to enjoy the scenery.
What makes the Osterseen lakes geologically significant?
The Osterseen lakes are a prime example of an 'ice disintegration landscape,' formed by the retreat of glaciers during the last Ice Age. This geological history created a distinctive chain of approximately 20 small, interconnected lakes and ponds, characterized by wide views, glittering waters, swamps, and forests. Information boards are available at the Geotope to explain this unique phenomenon.
Are there any specific rules or considerations for visiting the natural monuments, especially with dogs?
When visiting the natural monuments, particularly the sensitive moor and wetland areas around the Osterseen, it's crucial to stay on designated paths to protect the delicate ecosystem and for your safety due to the presence of adders. While specific dog regulations for Iffeldorf's natural monuments aren't detailed, it's generally recommended to keep dogs on a leash in nature reserves to prevent disturbance to wildlife and other visitors.
How long does it typically take to explore the main natural monuments around Iffeldorf?
The time required varies depending on your chosen activity. A leisurely circular tour around the Osterseen, such as the one starting from Iffeldorf railway station, can take a few hours. Exploring the Benediktbeuren moor landscape via its 23 km circular route might take half a day or more. Shorter visits to specific spots like the Blue Gumpe Spring can be done in under an hour, allowing for photography and quiet contemplation.
What do visitors enjoy most about the natural monuments in Iffeldorf?
Visitors frequently praise the serene beauty and tranquil atmosphere of the region. Many appreciate the 'Caribbean flair' of the clear Osterseen waters and the extensive hiking opportunities. The unique geological formations and rich biodiversity, including the chance to spot various bird and reptile species, are also highly valued. The overall experience of immersing oneself in the beautiful nature of Upper Bavaria is a common highlight.
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