Chiemsee (German pronunciation: [ˈkiːmzeː] ) is a freshwater lake in Bavaria, Germany, near Rosenheim. It is often called "the Bavarian Sea". The rivers Tiroler Achen and Prien flow into the lake from the south, and the river Alz flows out towards the north. The Alz flows into the Inn which then merges with the Danube. The Chiemsee is divided into the bigger, north section, in the northeast, called Weitsee, and the Inselsee, in the southwest. The Chiemgau, the region surrounding the Chiemsee, is a popular recreation area.
While the lake’s vast surface invites year-round activity, its character shifts dramatically with the calendar. In early summer, the north‑west shore sees a gentle surge of sailing clubs testing the breezes that sweep off the Alps, creating a mosaic of colourful hulls that glint against the clear water. Come September, the same bays become quieter as locals trade their trimaran for a rowboat, using the softer light to harvest wild herbs along the reeds—a practice handed down through generations. Winter, though rarely frozen, drapes the shoreline in a hush that is perfect for long walks, when the distant toll of the Frauenchiemsee church bells echoes across the mist, offering a contemplative backdrop to the scant fishing activity that persists.
Most visitors focus on the famous islands, yet the mainland settlements around the lake hold a subtle allure. The village of Prien, perched where the river of the same name meets the lake, retains a market square lined with early 20th‑century timber façades, where weekly farmers’ markets showcase regional cheeses and smoked fish caught in the lake’s own waters. Further north, the town of Bernau offers a modest bike‑rental hub; the quiet cycle path that hugs the eastern shore provides uninterrupted views of the Alps reflected in the water, punctuated only by the occasional herd of grazing cattle. Staying in a family‑run guesthouse in these villages offers a slower tempo, and hosts are keen to share stories of the lake’s role in Bavarian folklore, adding a narrative layer absent from guidebooks.
Designated a Ramsar wetland, the lake supports a surprising diversity of avian life, especially during migration periods. Birdwatchers will note that the reed‑fringed shallows host a seasonal influx of greylag geese and black‑tailed godwits, whose low calls blend with the gentle lapping of water. For those keen on responsible tourism, the best practice is to refrain from anchoring in the protected zones near the smaller islands, where submerged vegetation serves as nursery grounds for native fish. Instead, opt for guided kayak tours that follow the marked routes, allowing you to observe the delicate balance of water, flora and fauna without disturbing the habitats that sustain the lake’s reputation as a vital ecological corridor.
Freshwater lake in Bavaria, Germany For the municipality, see Chiemsee (municipality). For the bishopric, see Bishopric of Chiemsee. ChiemseeSatellite view of the ChiemseeChiemseeLocationBavariaCoordinates47°53′24″N 12°28′12″E / 47.89000°N 12.47000°E / 47.89000; 12.47000TypeNatural lakePrimary inflowsTiroler Achen, PrienPrimary outflowsAlzBasin countriesGermanySurface area79.9 km2 (30.8 sq mi)Max. depth72.7 m (239 ft)Water volume2,048×10^6 m3 (72.3×10^9 cu ft)Shore length163.96 km (39.74 mi)Surface elevation518.19 m (1,700.1 ft)IslandsHerreninsel, Fraueninsel, Krautinsel, SchalchRamsar WetlandDesignated26 February 1976Reference no.95 1 Shore length is not a well-defined measure. Location of Chiemsee in South Germany Chiemsee (German pronunciation: [ˈkiːmzeː] ⓘ) is a freshwater lake in Bavaria, Germany, near Rosenheim. It is often called "the Bavarian Sea". The rivers Tiroler Achen and Prien flow into the lake from the south, and the river Alz flows out towards the north. The Alz flows into the Inn which then merges with the Danube. The Chiemsee is divided into the bigger, north section, in the northeast, called Weitsee, and the Inselsee, in the southwest. The Chiemgau, the region surrounding the Chiemsee, is a popular recreation area. High resolution map of the lake within its surrounding region, Chiemgau
[edit] The Chiemsee was formed, like many other pre-alpine lakes, at the end of the last ice age about 10,000 years ago from a hollow carved out by a glacier (a Zungenbecken). Originally the lake covered an area of almost 240 km2 (93 sq mi), which is about three times its present area. Within 10,000 years its area had shrunk to around 80 km2 (31 sq mi). Before 1904 the water level was lowered by about a metre. As a result, large areas of dry land were reclaimed.[citation needed]
[edit] There are three main islands on the lake: Herreninsel ("gentlemen's island"), the largest, with an area of 238 hectares (590 acres); Frauenchiemsee, 15.5 ha (38 acres), also called Fraueninsel ("ladies' island"); and the uninhabited Krautinsel ("cabbage island"), 3.5 ha (8.6 acres), called by this name because in the Middle Ages it was cultivated with cabbages and other vegetables. Herreninsel has a palace built by King Ludwig II in 1878 called Herrenchiemsee, which was never completed but was meant to be a replica of the Palace of Versailles. Many of its rooms are open to tourists; tours of the palace and its extensive grounds are conducted throughout the summer. Frauenchiemsee, the smaller of the two main islands, houses a Benedictine nunnery, built in 782, as well as a small village. The nuns make a liquor called Klosterlikör ("cloister liquor") and marzipan (almond paste). The smallest island in the lake is the Schalch 66 m (217 ft) west of Frauenchiemsee, which is of square outline, with a side length of only 4.7 m (15 ft) or an area of 22 m2 (240 sq ft). This tiny island had probably been created artificially to mark a shallow spot for sailboats. There is a willow on the island, originally planted in 1935, and replaced by a young tree in the 2000s.[citation needed] View across the Chiemsee with the Chiemgau Alps in the background Herreninsel with the former Monastery "Kloster Herrenchiemsee" Fraueninsel with Monastery "Frauenchiemsee" in the foreground Krautinsel with (right) a small part of the Herreninsel island and in the background the Chiemgau Alps
[edit] On 1 September 1938 the first Autobahn rest house opened on the A8 on the outskirts of Bernau am Chiemsee on the lake's southern shore. From 1945 until 2 September 2003 the building served as an Armed Forces Recreation Center for the US military, called the Lake Hotel. The building is now an orthopaedic clinic.[citation needed]