Finland kallerna · Public domain
The cut
133 metres, to scale.
A slice through Korouoma where it is deepest and narrowest, measured on the Copernicus relief model every 30 m. Same scale as the landmark standing on the floor.
Standing on the floor, to scale: Big Ben · 96 m
Depth is measured to the lower rim; the width is from rim to rim. A 30 m relief model smooths the narrowest walls, so a slot canyon reads shallower than it is.
133m
Depth
measured on the 30 m relief model
2.6km
Rim to rim
measured on the 30 m relief model
23°
Steepest wall
average over 300 m, from the relief
132m
Floor altitude
Rim to floor
Afternoons, up top and down below.
In July the afternoon reaches 20 °C. The best months to hike are from July to August. The rim freezes at night from November to April. The wettest months are from July to August.
- -9°-10°Jan
- -8°-9°Feb
- -3°-4°Mar
- 2°1°Apr
- 11°10°May
- 16°16°Jun
- 20°19°Jul
- 17°16°Aug
- 11°10°Sep
- 3°2°Oct
- -3°-4°Nov
- -6°-7°Dec
Afternoon highs, 1991–2020 averages (NASA POWER) brought to the altitude of the rim and of the floor with the standard lapse rate (6.5 °C per 1 000 m). Shade, wind and rock change this on the day. Not a forecast.
Canyon and nature reserve at Posio, Finland
Korouoma is a canyon in Finland, cut by the Korojoki river. The relief model measures 133 m from the floor to the lower rim. Rim to rim it is 2.6 km wide where the cut was taken.
Getting there.
- Parking 2,870 m awaynearest car park in OpenStreetMap, straight line
- Viewpointsnearest viewpoint · 2.0 km from the floor
- Kuusamo Airport (KAO)nearest airport with scheduled flights · 79 km in a straight lineCar hire at KAO airport (Kuusamo)Discover Cars · sponsored link↗
- From July to Augustbest months to hike (estimate)
Plan the visit
Guided hikes, 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 the sky.
The canyon from above, with the relief shaded, the line of the cut, the river and what people have mapped around it.
N
1.5 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 6.0 × 6.0 km, north up. The line is the cut above. Points © OpenStreetMap contributors.
Around the canyon.
- 3viewpoints within 5 kmHannunkallio
- 2marked hiking routes within 4 kmKorouoma retkeilyreitti, Koronjää
- 8climbing crags within 3 kmPirunkirkko, Veitsileikkaus, Champs and 5 more
- 9footbridges and suspension bridges within 3 kmRetkeilyreitti and 8 more
- 4named waterfalls within 4 kmKoivuköngäs, Saukko-ojan putous, Neitoköngäs and 1 more
- 1car parks within 3 km
- 5information boards and visitor centres within 4 km
- 1restaurants and cafés within 4 km
- via ferrata routes within 4 km
- rafting, canoe, kayak or canyoning spots within 4 km
- swimming spots within 3 km
- caves within 3 km
- bus stops within 2 km
- campsites within 8 km
- hotels and guesthouses within 8 km
Counted in OpenStreetMap, the map anyone can edit, around the floor of the canyon. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
In our other atlases
What else is around Korouoma.
The river that carved it, the waterfalls inside it, the mountains on the rim, the lakes, beaches and island nearby — from our six sister atlases, each with its own figures.
Peakyas1 mountains within 15 km
Lakeyas24 lakes within 15 kmComing soonFigures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather, at the floor and at the rim.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon · floor | -9 | -8 | -3 | 2 | 11 | 16 | 20 | 17 | 11 | 3 | -3 | -6 |
| Afternoon · rim | -10 | -9 | -4 | 1 | 10 | 16 | 19 | 16 | 10 | 2 | -4 | -7 |
| Night · rim | -16 | -15 | -11 | -4 | 2 | 8 | 11 | 9 | 5 | -2 | -8 | -13 |
| Rain (mm) | 51 | 40 | 44 | 50 | 82 | 91 | 108 | 95 | 86 | 73 | 63 | 60 |
| Rainy days | 13 | 12 | 12 | 12 | 17 | 17 | 19 | 17 | 15 | 16 | 16 | 15 |
| Sun hours/day | 0.6 | 2.5 | 5.9 | 8.4 | 8.2 | 8.9 | 7.9 | 5.9 | 3.3 | 1.1 | 0.3 | 0.2 |
| Snow on the ground (cm) | 47 | 60 | 65 | 41 | 6 | 0 | 0 | 0 | 1 | 11 | 19 | 31 |
| Afternoon · floor | Afternoon · rim | Night · rim | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | -9 | -10 | -16 | 51 | 0.6 |
| Feb | -8 | -9 | -15 | 40 | 2.5 |
| Mar | -3 | -4 | -11 | 44 | 5.9 |
| Apr | 2 | 1 | -4 | 50 | 8.4 |
| May | 11 | 10 | 2 | 82 | 8.2 |
| Jun | 16 | 16 | 8 | 91 | 8.9 |
| Jul | 20 | 19 | 11 | 108 | 7.9 |
| Aug | 17 | 16 | 9 | 95 | 5.9 |
| Sep | 11 | 10 | 5 | 86 | 3.3 |
| Oct | 3 | 2 | -2 | 73 | 1.1 |
| Nov | -3 | -4 | -8 | 63 | 0.3 |
| Dec | -6 | -7 | -13 | 60 | 0.2 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the floor (132 m) and the rim (274 m) with the standard lapse rate. Not a forecast.
Photographs
Seen from the trail.
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 | 146% | 226% | 130% | 102% | 91% | 115% | 159% | 87% | 113% | 193% | 148% | 106% |
| 2021 | 105% | 89% | 99% | 173% | 102% | 135% | 54% | 183% | 88% | 205% | 83% | 77% |
| 2022 | 70% | 142% | 57% | 128% | 95% | 104% | 140% | 147% | 78% | 144% | 52% | 104% |
| 2023 | 128% | 96% | 108% | 94% | 77% | 87% | 119% | 141% | 149% | 124% | 55% | 62% |
| 2024 | 85% | 127% | 101% | 145% | 42% | 115% | 165% | 91% | 125% | 110% | 90% | 100% |
| 2025 | 107% | 99% | 122% | 81% | 114% | 145% | 82% | 90% | 111% | 115% | 128% | 137% |
130% or more: wet month 70% or less: dry month
Where these figures come from
| Name, type, published depth and length | Wikidata (Q6432586) · CC0 |
|---|---|
| The cut: depth, width, wall and 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 |
| Viewpoints, trails, bridges and the river line | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, mountains, lakes, 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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