Hidden deep within Styria’s Ausseerland Salzkammergut lake region, just a short distance from the picturesque Grundlsee and the secluded Kammersee, lies Toplitzsee (Lake Toplitz). Here, raw alpine nature reigns supreme with jaw-dropping dramatic scenery. Hemmed in by the sheer, forested cliffs of the Totes Gebirge (Dead Mountains), the lake is accessible only on foot, creating a tranquil atmosphere reminiscent of a Scandinavian fjord.
Widely considered one of the most unique and enchanting lakes in Austria, Toplitzsee is equally celebrated for its pristine natural beauty and its fascinating, mysterious history. With virtually no hotels or private houses along its shores, it remains completely untouched—a serene sanctuary in the heart of the Austrian Alps.
A Glimpse of Lake Toplitz
General Information & Geography
Lake Toplitz stretches approximately 1.9 kilometers (1.2 miles) in length and reaches a maximum width of about 400 meters. Situated at an elevation of 718 meters above sea level, its sheer mountain walls plunge dramatically into the water. With a maximum depth of 107 meters (351 feet), it is one of the deepest lakes in the Salzkammergut region.
Scientifically, Toplitzsee is a rare meromictic lake: its water layers do not mix. Down to a depth of around 20 meters, the water contains dissolved oxygen supporting lake trout and char. Below 20 meters, however, the water turns saline and completely devoid of oxygen, harboring only specialized bacteria. The water remains cold year-round, barely reaching 17°C (63°F) even in the height of summer. Because the lake is a protected nature reserve, swimming is strictly prohibited, though visitors can explore its waters via traditional wooden boat tours.
The Mystery of Lake Toplitz: Naval Tests & Hidden WWII Treasure
Beyond its natural beauty, Toplitzsee holds a dark and enigmatic history from World War II. Due to its extreme depth, sheer cliffs, and complete isolation, the German Navy (Kriegsmarine) used the lake as a top-secret naval experimental testing station between 1943 and 1945, testing torpedoes, underwater depth charges, and missile launch mechanisms.
During the final days of the war in 1945, as Allied troops advanced across Austria, retreating Nazi officers reportedly transported dozens of heavy wooden and zinc-lined crates to Toplitzsee and dumped them into the deep water. Rumors of sunken treasures and confidential archives circulated for years until 1959, when an investigative dive team retrieved crates from the bottom filled with millions of pounds in counterfeit British banknotes—relics of Operation Bernhard, a covert Nazi scheme to destabilize the British economy with forged currency.
Subsequent diving expeditions in 1963, 1978, 1986, and 2000 uncovered additional boxes of counterfeit money, naval research equipment, and rocket components. Although rumors persist that gold bars and stolen valuables remain buried in the lake’s thick bottom mud, no official gold hoard has ever been discovered. Visitors can view historic photographs and recovered artifacts on display at the lake’s rustic tavern, the Fischerhütte.
Things to Do at Lake Toplitz
1. The Scenic Circular Hike from Gößl
Because the mountains plunge directly into the water, there is no trail that loops around the entire shoreline. The primary and most popular walking route starts from the village of Gößl at the eastern tip of Lake Grundlsee and leads gently through peaceful forest paths to Toplitzsee and the historic Fischerhütte tavern.
Trail Overview:
- Starting Point: Gößl Recreation Center (Freizeitzentrum Gößl) car park.
- Trail Description: The route follows a well-marked, gentle forest track passing an ancient water mill and a memorial plaque. The walk to the lake shore takes roughly 20–25 minutes (about 2 km / 1.2 miles each way).
- At the Lake: Relax with fresh local char and refreshments at the Fischerhütte, take in the views of cascading waterfalls plunging from the cliffs, or board a wooden boat tour.
- Return Trip: You can retrace your steps or follow the gravel road along the river back to Gößl for a scenic 1.5-hour round-trip circuit.
View Official Route Details & Trail Map »
2. Traditional Wooden Boat Ride (“Plätte”)
To experience the lake’s sheer cliffs and access the otherwise unreachable Kammersee (where a picturesque waterfall flows), you can board a traditional flat-bottomed wooden boat known locally as a Plätte. Boat tours operate seasonally between May and October and take approximately 45–60 minutes.
Boat Tour Fares (Approximate):
- Adults: €14
- Children: €8.40
Book Boat Tour Tickets Online (Grundlsee-Toplitzsee Navigation) »
Best Time to Visit & Weather
The visitor season at Lake Toplitz runs from early May through late October, when paths are clear and boat tours are in full swing:
- Summer (June – August): Pleasant daytime temperatures averaging 20°C–25°C (68°F–77°F). Ideal for outdoor hiking, boating, and dining lakeside.
- Autumn (September – October): One of the most magical times to visit. The dense alpine foliage turns brilliant shades of gold and amber, reflected in the dark still water, with fewer tourists and comfortable walking temperatures (10°C–18°C).
- Winter (November – April): The area receives heavy snowfall and freezing temperatures. While the frozen landscape is breathtaking, trails and boat operations are suspended, and access may be restricted.
How to Get There & Parking
Toplitzsee cannot be reached directly by car. Drivers should navigate to the village of Gößl at the eastern shore of Grundlsee, park in the dedicated visitor lot, and walk the remaining 20 minutes on foot to the lake.
- Parking Address: Parkplatz, Gößl 225-231, 8993 Grundlsee, Austria
- Parking Fee: Approx. €8 for a full-day ticket.
Practical Visiting Tips
- Free Admission: Access to the lake shore and surrounding nature trails is completely free and open year-round.
- Arrive Early in Summer: On sunny weekends during July and August, the Gößl parking lot can fill up quickly. Arriving before 10:00 AM guarantees a spot and peaceful morning views.
- Dress in Layers: Due to mountain shadows and cold water, temperatures at the lake shore are noticeably cooler than in nearby towns. Bring a light fleece or windproof jacket.
- Carry Cash: Rural alpine huts, boat ticket booths, and parking machines often do not accept international credit cards.
Nearby Attractions in Ausseerland
Combine your visit to Lake Toplitz with these popular nearby destinations:
- Grundlsee: Styria’s largest natural lake, offering sailing, swimming beaches, and scenic walking promenades.
- Altaussee Salt Mine (Salzwelten): Historic underground salt mines famous as the secret bunker where thousands of European art treasures were hidden from the Nazis during WWII.
- Bad Aussee: The charming cultural and spa town considered the geographical center of Austria, famous for traditional Austrian Tracht and the annual Narcissus Festival.
