France Florian Pépellin · CC BY-SA 4.0
The cut
916 metres, to scale.
A slice through Gorges du Sierroz 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: Eiffel Tower · 330 m · Burj Khalifa · 828 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.
916m
Depth
measured on the 30 m relief model
13.4km
Rim to rim
measured on the 30 m relief model
48°
Steepest wall
average over 300 m, from the relief
230m
Floor altitude
Rim to floor
8 °C warmer at the bottom.
In July the afternoon reaches 27 °C on the floor, against 19 °C on the rim. The best months to hike are in May and from September to October. The rim freezes at night from November to March.
- 7°-1°Jan
- 8°0°Feb
- 13°5°Mar
- 17°9°Apr
- 21°13°May
- 25°17°Jun
- 27°19°Jul
- 27°19°Aug
- 23°15°Sep
- 18°10°Oct
- 12°4°Nov
- 7°-1°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 in France
Gorges du Sierroz is a canyon in France, cut by the Sierroz river. The relief model measures 916 m from the floor to the lower rim, and 1,234 m to the higher one. Rim to rim it is 13 km wide where the cut was taken.
Getting there.
- Grésy-sur-Aixnearest town · 0.6 km in a straight line
- Parking 860 m awaynearest car park in OpenStreetMap, straight line
- Viewpointsnearest viewpoint · 0.1 km from the floor
- Chambéry Aix les Bains airport (CMF)nearest airport with scheduled flights · 10 km in a straight lineCar hire at GNB airport (Grenoble)Discover Cars · sponsored link↗
- In May and from September to Octoberbest 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.
The river
The Sierroz runs highest from October to June.
The Sierroz carries about 2.7 m³/s on average here.
- 3.6 m³/sJan
- 3.2 m³/sFeb
- 3.8 m³/sMar
- 3.3 m³/sApr
- 3.7 m³/sMay
- 2.5 m³/sJun
- 1.3 m³/sJul
- 1.1 m³/sAug
- 1.3 m³/sSep
- 2.6 m³/sOct
- 3.6 m³/sNov
- 3.5 m³/sDec
From about 1.1 m³/s in the lowest month to 3.8 m³/s in the highest. Its basin above this point covers 128 km².
Estimate: long-term flow from the HydroATLAS model (WaterGAP, 1971–2000) shaped by the monthly rain, snow and temperature of the area (NASA POWER). Dams change it. Not a forecast.
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
6 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 24 × 24 km, north up. The line is the cut above. Points © OpenStreetMap contributors.
Around the canyon.
- 47viewpoints within 5 kmBelvédère du Revard, Grotte des Fées, Belvédère du Bois Vidal and 44 more
- 144marked hiking routes within 4 kmGR 96 and 143 more
- 2climbing crags within 3 kmBaie de Grésine, Baie Latine
- 27footbridges and suspension bridges within 3 kmChemin de la Baye, Au fil de l'eau, Esplanade du Petit Port and 24 more
- 5rafting, canoe, kayak or canyoning spots within 4 kmMise à l'eau and 4 more
- 2swimming spots within 3 km
- 2named waterfalls within 4 kmCascade des Gents, Cascade de Grésy
- 1caves within 3 km
- 178car parks within 3 km
- 60information boards and visitor centres within 4 km
- 63bus stops within 2 km
- 21campsites within 8 kmAire de bivouac - véhicule, La Colombière, Sous la Colline and 18 more
- 56hotels and guesthouses within 8 kmAzuréa, Adelphia, Hôtel Savoy and 53 more
- 105restaurants and cafés within 4 km
- via ferrata routes within 4 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).
Towns nearby
- Grésy-sur-Aix0.6 km in a straight line
- Brison-Saint-Innocent2.5 km in a straight line
- Aix-les-Bains3.2 km in a straight line
- Mouxy4.1 km in a straight line
- La Biolle4.4 km in a straight line
- Tresserve5.1 km in a straight line
- Drumettaz6.5 km in a straight line
- Viviers-du-Lac7.9 km in a straight line
In our other atlases
What else is around Gorges du Sierroz.
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.
Peakyas20 mountains within 15 km
Lakeyas2 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 | 7 | 8 | 13 | 17 | 21 | 25 | 27 | 27 | 23 | 18 | 12 | 7 |
| Afternoon · rim | -1 | 0 | 5 | 9 | 13 | 17 | 19 | 19 | 15 | 10 | 4 | -1 |
| Night · rim | -8 | -8 | -5 | -1 | 3 | 7 | 9 | 8 | 4 | 1 | -4 | -7 |
| Rain (mm) | 79 | 62 | 74 | 69 | 97 | 77 | 72 | 76 | 70 | 89 | 97 | 86 |
| Rainy days | 12 | 10 | 11 | 12 | 14 | 13 | 12 | 10 | 10 | 12 | 13 | 12 |
| Sun hours/day | 2.6 | 4.0 | 5.8 | 6.9 | 7.4 | 9.4 | 9.8 | 8.7 | 7.0 | 4.7 | 2.9 | 2.3 |
| Snow on the ground (cm) | 16 | 14 | 9 | 5 | 2 | 0 | 0 | 0 | 0 | 2 | 8 | 14 |
| Afternoon · floor | Afternoon · rim | Night · rim | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 7 | -1 | -8 | 79 | 2.6 |
| Feb | 8 | 0 | -8 | 62 | 4.0 |
| Mar | 13 | 5 | -5 | 74 | 5.8 |
| Apr | 17 | 9 | -1 | 69 | 6.9 |
| May | 21 | 13 | 3 | 97 | 7.4 |
| Jun | 25 | 17 | 7 | 77 | 9.4 |
| Jul | 27 | 19 | 9 | 72 | 9.8 |
| Aug | 27 | 19 | 8 | 76 | 8.7 |
| Sep | 23 | 15 | 4 | 70 | 7.0 |
| Oct | 18 | 10 | 1 | 89 | 4.7 |
| Nov | 12 | 4 | -4 | 97 | 2.9 |
| Dec | 7 | -1 | -7 | 86 | 2.3 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the floor (230 m) and the rim (1,464 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 | 55% | 128% | 93% | 66% | 105% | 155% | 30% | 118% | 98% | 175% | 29% | 137% |
| 2021 | 168% | 75% | 70% | 85% | 153% | 103% | 197% | 77% | 111% | 92% | 74% | 204% |
| 2022 | 44% | 102% | 28% | 103% | 38% | 112% | 18% | 73% | 172% | 67% | 121% | 147% |
| 2023 | 70% | 8% | 167% | 111% | 74% | 116% | 46% | 87% | 94% | 162% | 184% | 198% |
| 2024 | 126% | 93% | 138% | 115% | 151% | 149% | 109% | 47% | 234% | 153% | 49% | 121% |
| 2025 | 150% | 45% | 64% | 111% | 74% | 79% | 100% | 78% | 171% | 138% | 113% | 40% |
130% or more: wet month 70% or less: dry month
Compare with the neighbours.
Gorges du Sierroz
France
- 916 mDepth
- 13 kmRim to rim
- —Length
- 48°Steepest wall
Gorges du Val du Fier
France · 26 km
- 761 mDepth
- 10 kmRim to rim
- 3.5 kmLength
- 30°Steepest wall
Where these figures come from
| Name, type, published depth and length | Wikidata (Q86661369) · CC0 |
|---|---|
| The cut: depth, width, wall and 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| River flow and basin | HydroATLAS / RiverATLAS v1.0 (Linke et al. 2019) · CC BY 4.0 |
| 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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