Germany Kauk0r · CC BY-SA 3.0
The descent
96 metres down, to scale.
The real relief above Hölloch, measured on the Copernicus model every 30 m, and the cave going down at the same vertical scale.
Tower of Pisa (56 m) would fit upside down 1.7 times.
The depth is the one published by those who explored it; the shape of the galleries is a sketch, not a survey.
96m
Depth
published (Wikidata)
11km
Galleries
surveyed length (Wikidata)
1,438m
Entrance altitude
published (Wikidata)
4°C
Inside, all year
the yearly average outside, at the entrance
525m
Rock above
the highest point within 1.5 km
Inside and outside
4 °C inside, all year.
Deep inside, a cave keeps the average temperature of the year outside: about 4 °C here, in January and in August. In July the afternoon reaches 18 °C at the entrance, 14 °C warmer than inside: take a jacket. The wettest months are from June to August: water rises fast underground, so never go in without a guide after heavy rain.
- -2°-9°Jan
- -2°-9°Feb
- 3°-5°Mar
- 8°-1°Apr
- 12°3°May
- 16°8°Jun
- 18°9°Jul
- 17°9°Aug
- 13°5°Sep
- 9°1°Oct
- 3°-4°Nov
- -1°-8°Dec
Outside: afternoon and night averages for 1991–2020 (NASA POWER) brought to the altitude of the entrance. Inside: the yearly average, which deep parts of a cave keep. Near the entrance it follows the weather a little.
Pit cave in the Allgäu Alps in Bavaria, Germany
Hölloch is a abyss in Germany. It goes down 96 m below the entrance and has 11 km of surveyed galleries. The entrance is at 1,438 m. It has several entrances and long galleries.
Getting there.
- Wild cave: only with caving equipmentNo paths or lights inside. Go only with a caving club or a qualified guide.
- Mittelbergnearest town · 3.4 km in a straight line
- Viewpointsnearest viewpoint · 2.9 km from the entrance
- Sankt Gallen Altenrhein Airport (ACH)nearest airport with scheduled flights · 46 km in a straight lineCar hire at ACH airport (St. Gallen)Discover Cars · sponsored link↗
Plan the visit
Guided tours, a bed nearby, a car.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
From above.
The ground above the cave, with the relief shaded, the line of the section and what people have mapped around the entrance.
N
1.5 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 6.0 × 6.0 km, north up. The line is the section above. Points © OpenStreetMap contributors.
Around the entrance.
- 1other cave entrances within 3 kmHölloch
- 6springs within 2 km
- 2viewpoints within 3 km
- 1marked hiking routes within 3 kmOberallgäuer Rundwanderweg
- 1climbing crags within 3 kmKlettergarten Wäldele
- 1car parks within 2 km
- 7information boards and visitor centres within 3 km
- 1bus stops within 2 km
- 5campsites within 8 kmCamping Jochum, Camping Zwerwald, Rieder Wiesen and 2 more
- 361hotels and guesthouses within 8 kmBergruh, Brunnenhof, Pension Berghof and 358 more
- 23restaurants and cafés within 3 km
- sinkholes within 3 km
- caving clubs and spots within 15 km
- named waterfalls within 4 km
Counted in OpenStreetMap, the map anyone can edit, around the entrance. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Mittelberg3.4 km in a straight line
- Riezlern3.6 km in a straight line
- Hirschegg3.7 km in a straight line
- Sibratsgfäll10 km in a straight line
- Oberstdorf10 km in a straight line
- Bolsterlang12 km in a straight line
- Schoppernau12 km in a straight line
- Au14 km in a straight line
In our other atlases
What else is around Hölloch.
The river at the entrance, the waterfalls, the lakes, the mountains and volcanoes above, the canyons, beaches and islands nearby — from our other atlases.
Peakyas38 mountains within 10 kmFigures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather outside, at the entrance.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon | -2 | -2 | 3 | 8 | 12 | 16 | 18 | 17 | 13 | 9 | 3 | -1 |
| Afternoon | -2 | -2 | 3 | 8 | 12 | 16 | 18 | 17 | 13 | 9 | 3 | -1 |
| Night | -9 | -9 | -5 | -1 | 3 | 8 | 9 | 9 | 5 | 1 | -4 | -8 |
| Rain (mm) | 98 | 76 | 93 | 88 | 148 | 166 | 163 | 176 | 120 | 97 | 84 | 97 |
| Rainy days | 13 | 12 | 15 | 15 | 19 | 20 | 19 | 18 | 15 | 13 | 13 | 14 |
| Sun hours/day | 3.3 | 4.6 | 5.5 | 6.0 | 6.1 | 7.0 | 7.3 | 6.8 | 5.5 | 4.6 | 3.0 | 2.8 |
| Snow on the ground (cm) | 25 | 26 | 18 | 8 | 4 | 1 | 0 | 0 | 2 | 6 | 12 | 19 |
| Afternoon | Afternoon | Night | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | -2 | -2 | -9 | 98 | 3.3 |
| Feb | -2 | -2 | -9 | 76 | 4.6 |
| Mar | 3 | 3 | -5 | 93 | 5.5 |
| Apr | 8 | 8 | -1 | 88 | 6.0 |
| May | 12 | 12 | 3 | 148 | 6.1 |
| Jun | 16 | 16 | 8 | 166 | 7.0 |
| Jul | 18 | 18 | 9 | 163 | 7.3 |
| Aug | 17 | 17 | 9 | 176 | 6.8 |
| Sep | 13 | 13 | 5 | 120 | 5.5 |
| Oct | 9 | 9 | 1 | 97 | 4.6 |
| Nov | 3 | 3 | -4 | 84 | 3.0 |
| Dec | -1 | -1 | -8 | 97 | 2.8 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the altitude of the entrance (1,438 m) with the standard lapse rate. Not a forecast.
Photographs
Inside and around.
Recent years
Wet years, dry years.
Rain of each month as a share of the 1991–2020 average. A dry year means a lower river and hotter rock; a wet one, more water in the gorge.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 52% | 221% | 85% | 57% | 68% | 152% | 81% | 133% | 113% | 134% | 33% | 99% |
| 2021 | 182% | 75% | 92% | 59% | 120% | 94% | 175% | 129% | 64% | 43% | 102% | 126% |
| 2022 | 59% | 152% | 17% | 104% | 87% | 105% | 67% | 85% | 138% | 113% | 95% | 85% |
| 2023 | 50% | 76% | 127% | 190% | 115% | 43% | 114% | 145% | 61% | 101% | 298% | 212% |
| 2024 | 115% | 91% | 130% | 134% | 150% | 138% | 115% | 83% | 172% | 108% | 85% | 89% |
| 2025 | 101% | 39% | 72% | 50% | 88% | 72% | 163% | 85% | 114% | 91% | 100% | 22% |
130% or more: wet month 70% or less: dry month
Caves nearby.
Hölloch
Germany
- 96 mDepth
- 11 kmGalleries
- 1,438 mEntrance altitude
- 4 °CInside, all year
Wildkirchli
Switzerland · 56 km
- —Depth
- —Galleries
- 1,535 mEntrance altitude
- 3 °CInside, all year
Kobelwald Kristallhöhle
Switzerland · 47 km
- —Depth
- 0.1 kmGalleries
- 627 mEntrance altitude
- 9 °CInside, all year
Wildenmannlisloch (Paleolithic living cave)
Switzerland · 71 km
- —Depth
- —Galleries
- 1,645 mEntrance altitude
- 3 °CInside, all year
Where these figures come from
| Name, type, published depth and length, visitors | Wikidata (Q1485840) · CC0 |
|---|---|
| The relief above, the entrance altitude, the section and the 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 |
| Entrances, springs, sinkholes, opening hours and what is around | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, lakes, mountains, canyons, beaches and islands nearby | Coastya, Lakeyas, Peakyas, Cascadyas, Islandyas, Riveryas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers, canyons, caves, dark skies, viewpoints, birdwatching or forests?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
beaches
Find your beach: sea temperature, sun and swimming month by month.Visit 
lakes
Every lake on Earth: water temperature, ice, depth and the shore.Visit mountains
Every summit in 3D: summit weather, the 0 °C line, huts and trails.Visit 
waterfalls
Every waterfall: height, flow month by month and when it roars.Visit 
islands
Every island from the sea up: size, sea temperature, ferries and 3D.Visit 
rivers
Every river from source to sea: the journey, the flow and the basin in numbers.Visit 
canyons
Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Visit 
caves
Every cave with its real depth and length: the rock above, the temperature inside all year, and how to visit.You are here
dark skies
Where the night is still dark: the sky of every place, the Milky Way month by month, the Moon, eclipses and auroras.Coming soonVisit 
viewpoints
Every viewpoint with its real 360° panorama: the peaks you can name, how far you see and where the sun sets.Coming soonVisit 
birdwatching
Every bird sanctuary and wetland with the species recorded month by month: who is resident, who comes for the summer, who only passes through.Coming soonVisit 
forests
Every forest with its land-cover rings, what grows and lives in it, and the best months to walk it.Coming soonVisit