Croatia Cave system
Lukina jama–Trojama
3.7 km of galleries.
julien · CC BY 2.0
The descent
The entrance, at 1,438 m.
The real relief above Lukina jama–Trojama, measured on the Copernicus model every 30 m, and the cave going down at the same vertical scale.
The depth is the one published by those who explored it; the shape of the galleries is a sketch, not a survey. No depth has been published for this cave yet.
3.7km
Galleries
surveyed length (Wikidata)
1,438m
Entrance altitude
published (Wikidata)
5°C
Inside, all year
the yearly average outside, at the entrance
200m
Rock above
the highest point within 1.5 km
Inside and outside
5 °C inside, all year.
Deep inside, a cave keeps the average temperature of the year outside: about 5 °C here, in January and in August. In August the afternoon reaches 20 °C at the entrance, 15 °C warmer than inside: take a jacket. The wettest months are in September and in November: water rises fast underground, so never go in without a guide after heavy rain.
- -2°-8°Jan
- -1°-7°Feb
- 3°-4°Mar
- 8°0°Apr
- 13°4°May
- 17°8°Jun
- 20°10°Jul
- 20°10°Aug
- 14°5°Sep
- 9°2°Oct
- 4°-2°Nov
- -1°-6°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.
Cave system of the Velebit Mt., Croatia
Lukina jama–Trojama is a cave system in Croatia. It has 3.7 km of surveyed galleries. The entrance is at 1,438 m. It has several entrances and long galleries. It lies within Northern Velebit National Park.
Getting there.
- Wild cave: only with caving equipmentNo paths or lights inside. Go only with a caving club or a qualified guide.
- Barbatnearest town · 18 km in a straight line
- Rijeka Airport (RJK)nearest airport with scheduled flights · 61 km in a straight lineCar hire at RJK airport (Rijeka)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.
- 3other cave entrances within 3 kmSlovačka jama, Lukina jama
- 18marked hiking routes within 3 kmPremužićeva staza, Crikvena, Krajacev kuk and 15 more
- 1information boards and visitor centres within 3 km
- 15hotels and guesthouses within 8 kmKonoba Jure, Manjan, Planinarska kuća Alan and 12 more
- springs within 2 km
- sinkholes within 3 km
- caving clubs and spots within 15 km
- viewpoints within 3 km
- climbing crags within 3 km
- named waterfalls within 4 km
- car parks within 2 km
- bus stops within 2 km
- campsites within 8 km
- restaurants and cafés within 3 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
- Barbat18 km in a straight line
- Banjol20 km in a straight line
- Otočac20 km in a straight line
- Rab21 km in a straight line
- Palit21 km in a straight line
- Dubac-Varsan24 km in a straight line
- Kampor24 km in a straight line
- Lopar24 km in a straight line
In our other atlases
What else is around Lukina jama–Trojama.
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 | -1 | 3 | 8 | 13 | 17 | 20 | 20 | 14 | 9 | 4 | -1 |
| Afternoon | -2 | -1 | 3 | 8 | 13 | 17 | 20 | 20 | 14 | 9 | 4 | -1 |
| Night | -8 | -7 | -4 | 0 | 4 | 8 | 10 | 10 | 5 | 2 | -2 | -6 |
| Rain (mm) | 101 | 108 | 92 | 92 | 105 | 79 | 62 | 82 | 140 | 132 | 156 | 123 |
| Rainy days | 11 | 11 | 10 | 12 | 13 | 12 | 9 | 9 | 11 | 12 | 14 | 13 |
| Sun hours/day | 2.4 | 3.4 | 4.8 | 6.1 | 7.4 | 8.9 | 9.6 | 8.5 | 5.8 | 4.1 | 2.2 | 2.1 |
| Snow on the ground (cm) | 12 | 11 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 10 |
| Afternoon | Afternoon | Night | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | -2 | -2 | -8 | 101 | 2.4 |
| Feb | -1 | -1 | -7 | 108 | 3.4 |
| Mar | 3 | 3 | -4 | 92 | 4.8 |
| Apr | 8 | 8 | 0 | 92 | 6.1 |
| May | 13 | 13 | 4 | 105 | 7.4 |
| Jun | 17 | 17 | 8 | 79 | 8.9 |
| Jul | 20 | 20 | 10 | 62 | 9.6 |
| Aug | 20 | 20 | 10 | 82 | 8.5 |
| Sep | 14 | 14 | 5 | 140 | 5.8 |
| Oct | 9 | 9 | 2 | 132 | 4.1 |
| Nov | 4 | 4 | -2 | 156 | 2.2 |
| Dec | -1 | -1 | -6 | 123 | 2.1 |
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.
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 | 21% | 41% | 68% | 33% | 54% | 121% | 89% | 116% | 120% | 224% | 39% | 170% |
| 2021 | 176% | 67% | 56% | 128% | 101% | 14% | 155% | 73% | 74% | 53% | 117% | 130% |
| 2022 | 40% | 61% | 65% | 71% | 87% | 80% | 52% | 29% | 173% | 25% | 117% | 178% |
| 2023 | 167% | 59% | 97% | 117% | 156% | 158% | 176% | 217% | 45% | 131% | 162% | 99% |
| 2024 | 108% | 84% | 147% | 73% | 176% | 100% | 97% | 61% | 149% | 128% | 69% | 81% |
| 2025 | 106% | 87% | 161% | 118% | 113% | 27% | 209% | 106% | 97% | 128% | 84% | 43% |
130% or more: wet month 70% or less: dry month
Caves nearby.
Lukina jama–Trojama
Croatia
- —Depth
- 3.7 kmGalleries
- 1,438 mEntrance altitude
- 5 °CInside, all year
Slovačka jama
Croatia · 3 km
- —Depth
- 5.7 kmGalleries
- 1,520 mEntrance altitude
- 6 °CInside, all year
Biserujka cave
Croatia · 57 km
- 13 mDepth
- —Galleries
- 40 mEntrance altitude
- 15 °CInside, all year
Where these figures come from
| Name, type, published depth and length, visitors | Wikidata (Q7918880) · 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
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