Katerloch - Impression #1 | © Katerloch Katerloch - Impression #1 | © Katerloch

Katerloch

Weiz

Stalactite richest cave in Austria

The Katerloch

Let yourself be carried away into an underground world and learn everything there is to know about the cave and the researchers who dedicated their lives to it.

In one of the largest halls, the Hall of Imagination, which is now comfortably accessible through an intricate ladder and step system, expressive figures, fine sinter corals, gossamer thin, white and colored curtains, crystal clear crystals, and sparkling crystal columns are present amidst a true jungle of around 4000 large stalactite structures. Massive limestone formations and numerous bone finds from bears create the image of a prehistoric era untouched by humans.

The Katerloch cave was presumably known even earlier than the nearby Grassl Cave, which was discovered around 1750 after its entrance had been broken open by a tree and was first mentioned in 1816. In comparison, the entrance to the Katerloch (20 meters wide, 10 meters high) was significantly larger and easily recognizable from the outside.

The wealth of stalactites in perfectly beautiful forms
From the Hall of Imagination, one reaches the major discoveries of the year 1955, the Magic Realm and the Lake Paradise, whose diverse and bizarre shapes are hardly describable in words. At the lowest point, alabaster-white stalagmites and sinter islands rise from the turquoise-green shimmering water surface of an underground lake landscape, surrounded by lavish shore walls. Like an oversized script, the beauty of the cave is completed here. The sight of eternal creative forces provides the visitor with joyous contemplation, allowing everyday life to be forgotten and stimulating meditative thinking.

The cave researchers Hermann and Regina Hofer
The research couple Hermann and Regina Hofer lived, experienced, and worked for one and a half years during the initial development phase of the cave at a temperature of 5° Celsius, with 98 % humidity, and 100 meters below the earth's surface. Together, they dedicated 50 years of their lives to the “Katerloch Project.” Their steadfast belief in their goal was what drove them to move hundreds of tons of rock with their bare hands to “raise” this underground treasure.

Regina Hofer passed away in 1995 at the age of 83.
Hermann Hofer died at the age of 95 in 2003.

Two years before his death in 2003, Hermann Hofer transferred responsibility for the research site Katerloch to Mag. Fritz Geissler.


Photos & videos

April to October
Guided tours ONLY by PHONE REGISTRATION (Tel. +436644853420)


Route from Weiz (approx. 11km - 25 min.)
Weiz-South/Circle - Follow signs to Katerloch/Grasslhöhle - Weiz/Main Square - Göttelsberg - Turn off to Leska - Haselbach - Dürntal - Turn off Katerloch/Grasslhöhle - Katerloch

Route from Passail (approx. 11km - 25 min)
Passail/Main Square - Direction Weiz - Turn off to Haufenreith - Direction Weiz - before Dürntal - Turn off Katerloch/Grasslhöhle - Katerloch

Entry Fee:

Adults: € 25,- per person
Children/Youth: € 20,- per person
Payment in cash on site

Discount with Family Pass:

Minus € 5,- per family pass if at least 1 child is accompanying

Group Booking Discount (Clubs etc.):

€ 22,- per person: for 25 jointly booked and paid entries
€ 18,- per person: for school classes and similar minor groups (e.g. scouts, children's groups, summer camps)

Additional Information

Included services

Description of the guided tour:

The visitor completes about one kilometer of guided tour over serpentine paths, massive iron stairs, and 400 steps, with an elevation difference of 135m.

Through an impressive cave portal, one enters the gradually sloping entrance hall with powerful moss-covered and algae-overgrown sinter columns. The largest column is 22m high and has a circumference of 46m. From the "Viewing Hall," the gaze falls into the 45m deep abyss of the "Marteldome."

One of the largest halls is the 120m long, 85m wide, and 20m high "Fantasy Hall." Here, there is a true primeval forest of around 4,000 large stalactite structures with particularly expressive figures: fine limestone coral, delicate, white and colored curtains, crystal clear crystals, and sparkling crystal columns can be found. Numerous bone finds from cave bears complete the picture of a prehistoric era untouched by humans. Today, the entire cave is easily accessible via a sophisticated system of stairs and steps.

From the "Fantasy Hall," one can reach the further great discoveries of the researcher couple Hermann and Regina Hofer from the year 1955:
The "Magic Realm" and the "Lake Paradise," whose diverse, bizarre variety is hardly describable in words. At the lowest point, alabaster-white stalagmites and sinter islands rise from the turquoise-green shimmering water surface of a cave lake landscape, framed by lavish shore walls. As if created from an oversized screenplay, the beauty of Austria's most stalactite-rich show cave is completed here.

Requirements


- TELEPHONE PRE-REGISTRATION (Tel. +436644853420)
- Tours take place for groups of 9 or more  (for 1-8 people: joining existing groups of 9 is possible or a tour is available for an extra fee)
- Children: minimum age 8 years
- general physical and mental fitness  (for a total distance of 1km; 135 meters elevation/ approx. 400 steps; 2 hours)
- no alcohol or drug use before the cave tour
- good footwear  (e.g. sneakers, hiking shoes, half shoes with non-slip soles)
- warm clothing adapted to a cave temperature of 5° C  (In case of emergency, some jackets and shoes are available for borrowing)
- hat/cap recommended
- Bags, backpacks, umbrellas, sticks, cameras, and mobile phones must remain outside the cave (photos in front of the cave entrance are of course allowed)

Good to know

Photography & Filming: For safety reasons, photography & filming in the cave is NOT permitted.

We enter the cave WITHOUT: pets, alcoholic beverages, backpacks, bags of any kind (child carriers, shoulder bags, handbags), umbrellas, sticks

Opening hours

Guided times: April to October


ONLY by TELEPHONE APPOINTMENT (Tel. +436644853420)

Contact

Katerloch
Mag. Fritz Geissler
Dürntal 10
8160 Weiz

What the weather will be like Weiz (473m)

Today, 10.07.2026

Dry and bright with plenty of sunshine, clouds will be rare
Morning
very sunny
20°C
sr.Regenwahrscheinlichkeit 0%
sr.Windstärke 0 km/h
Noon
sunny
26°C
sr.Regenwahrscheinlichkeit 20%
sr.Windstärke 5 km/h
Night
very sunny
24°C
sr.Regenwahrscheinlichkeit 20%
sr.Windstärke 0 km/h

Tomorrow, 11.07.2026

Mostly sunny throughout the day with a chance of showers towards evening.
Morning
very sunny
20°C
sr.Regenwahrscheinlichkeit 0%
sr.Windstärke 0 km/h
Noon
very sunny
27°C
sr.Regenwahrscheinlichkeit 40%
sr.Windstärke 5 km/h
Night
cloudy
23°C
sr.Regenwahrscheinlichkeit 50%
sr.Windstärke 0 km/h

Forecast

12.07.2026
sunny
15°C 28°C
13.07.2026
very sunny
15°C 30°C
14.07.2026
rainy
16°C 30°C