Green Lake
Hidden in the heart of Styria, near the village of Tragöß, Grüner See (Green Lake) is one of Austria’s most unique natural wonders. Each spring, melting snow from the Hochschwab Mountains fills the valley, submerging trees, benches, and meadows beneath up to 12 meters of crystal-clear emerald water. By autumn, the lake recedes and the landscape returns to grassland – as if nature pressed a yearly reset button.
The lake’s vivid color comes from sunlight reflecting off limestone and vegetation, creating a surreal “underwater park.”
Grüner See: Key Information
Address:
Tragöß-Sankt Katharein, Styria, Austria
How to Get There
Grüner See lies 80 km from Graz (≈ 1 hour by car) and 180 km from Vienna (≈ 2.5-3 hours). Driving is easiest; public transport requires a train to Bruck an der Mur and a bus to Tragöß-Oberort, taking about 3-4 hours.
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Parking
GPS Parking: Grüner See Parkplatz
The main paid parking area is beside Restaurant Seehof.
Price: about €6 per day ( coins only ).
From there, it’s a 20-30 minute walk to the lake through forest or on a paved path. Overnight parking or camping is prohibited.
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Tickets
Entrance to Grüner See: Free (No ticket required; open area).
Duration
20-30 minute walk from the main parking to the lake; 4 km loop takes about 1-1.5 hours.
Best Time to Visit
The best time to visit Grüner See is between mid-May and late June, when the melting snow from the mountains fills the valley and the lake reaches its full depth – up to 12 meters. During this short period, the water shines in an intense emerald shade, creating perfect conditions for photography and reflection shots.
From July to September, the water level gradually drops, and green meadows begin to appear around and inside the basin. Although the lake becomes shallower, this is still a beautiful season for hiking – trails are dry, the weather is pleasant, and the scenery remains impressive.
Between October and April, the lakebed dries completely, transforming into a quiet alpine park surrounded by snowy peaks. It’s a calm and atmospheric time to visit, especially for those who enjoy solitude and crisp mountain air.
The best hours of the day are early morning before 10 a.m. or late afternoon after 5 p.m., when the light is soft, reflections are strongest, and the number of visitors is low.
What to See and Do
The Lake and Its Underwater Park
In late spring, benches and trees disappear under clear turquoise water mirroring the peaks of Pribitz, Meßnerin, and Trenchtling. All water activities have been banned since 2016 to protect the ecosystem.
Circular Trail
A flat 4 km loop around the lake and its smaller ponds (Kreuzteich, Pfarrerteich) takes about 1-1.5 hours – ideal for families. Expect ducks, frogs, and lots of photo opportunities.
Viewpoint and Restaurant Seehof
Enjoy local Styrian trout, schnitzel, and apple strudel with a lake view from the terrace of Gasthof Seehof Grüner See.
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Nearby Attractions
- Tragöß Dorf (2 km): small village with farm shops and local cheese.
- Marien Gorge (10 km): short family-friendly hike with waterfalls.
- Gesäuse National Park (30 km): alpine views and easy trails.

Tip from the Itinerary Expert: Combine Grüner See with Gesäuse for a full day of nature and mountain scenery.
Where to Eat and Stay
Seehof Grüner See – Classic Styrian menu with a panoramic view ( €20-30 ).
Gasthof Zum Grünen See – Casual local café in Tragöß ( €10-15 ).
Pension Seehof – Closest guesthouse to the lake (~€100 / night).
Gasthof Post Tragöß – Quiet stay with breakfast (~€90 / night).
A cozy wooden bench by the lakeshore, with sunlight touching the trees and the still water creating a perfect natural mirror.
2-Day Family Route
Trip Duration: 2 days
Day 1 - Arrival and Lakeside Walk
Morning (10 a.m.): Drive to Grüner See ( €6 parking ). Walk 15-20 minutes through the forest to the lake and spend time exploring the emerald shore.
Lunch (12:30 p.m.): Eat at Gasthof Seehof – child-friendly menu and lake view.
Afternoon (2 p.m.): Walk the 4 km loop around the lake and ponds ( ≈ 1 hour ). Relax on the grass afterward.
Dinner (6 p.m.): Try Gasthof Post Tragöß for traditional Styrian food in a cozy setting.
Day 2 - Nature and Fun Exploration
Morning (10 a.m.): Short drive to Marien Gorge – kids love the streams and small waterfalls.
Lunch (1 p.m.): Return toward the lake and stop at Hoamat-Kaffee for cakes and coffee.
Afternoon (2 – 5 p.m.): Let teens take photos or buy local honey in Tragöß. Enjoy the view from behind Seehof – the light is softer then.
Dinner (6 p.m.): End with a relaxed meal in a nearby tavern.
A stunning aerial view of a crystal-clear turquoise lake, surrounded by forest and mountain paths, like a hidden alpine gem.
Traveler Reviews
Emma Johnson
June 2024
We drove from Graz early morning – the emerald color was unreal. Kids loved spotting frogs along the trail. No cafés by the lake, so bring snacks.
Daniel Lee
May 2019
Nothing compares to seeing it in person. Arrive before 10 a.m. for peace and mirror-like reflections.
Olivia Martins
September 2023
We came late in the season and found a meadow instead of a lake – but it was still magical, peaceful, and perfect for a picnic.
Jack Bennett
May 2022
The drive from Vienna was worth it. The water was so clear it looked unreal – a must-see for families.
Sophia Adams
August 2018
Easy trails, clean facilities, and the best apple strudel at Seehof. Bring cash – no cards accepted.
Tips from the Itinerary Expert
- Arrive before 9:30 a.m. for the clearest colors and empty parking.
- Avoid GPS via Trofaiach – follow signs to Tragöß-Oberort instead.
- Walk clockwise for the best light and mountain reflections.
- Pack snacks and water – no shops on the trail.
- Carry a light jacket; even in summer it stays around 15 °C.
- Check recent photos before visiting – water levels change fast.
- Stay overnight nearby to enjoy the lake early before buses arrive.
Insights from the Itinerary Expert
I visited Grüner See in May 2023, just as snowmelt was filling the valley. Watching the green water rise around trees felt like seeing nature come alive. The loop trail is perfect for families – easy, beautiful, and never boring. My favorite spot was near Pfarrerteich, where the emerald color looked deepest. Even when the lake dries in autumn, the area remains peaceful and worth a visit.
Grüner See is a reminder that nature doesn’t stand still – it reinvents itself each season. Itinerary Expert invites you to create a personalized route that includes this extraordinary place and the most beautiful corners of Austria.
Price Table
| Name | Amount | Description |
|---|---|---|
| Entrance to Grüner See | Free EUR | No ticket required; open area |
| Main Parking (near Gasthof Seehof) | 6 / day EUR | Pay by coins only; cash payment |
| Public Toilets | Free EUR | Near main parking area |
| Café / Restaurant Seehof Grüner See | 20-30 / person EUR | Local dishes, trout, schnitzel, apple strudel |
| Café Zum Grünen See | 10-15 / person EUR | Soups, cakes, light meals |
| Pension / Guesthouse Stay | 90-150 / night EUR | Depends on type and proximity to the lake |
| Family Apartments (4-5 persons) | 120-150 / night EUR | Near Tragöß village |
| Parking at Marienklamm | Free / limited spaces EUR | Arrive early; small lot |
| National Park Gesäuse Entry | Free EUR | Pay only for parking (~5 EUR/day) |
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