France Unknown author · CC BY-SA 2.5
The cut
870 metres, to scale.
A slice through Gorges du Guiers Mort 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: Great Pyramid · 139 m · Empire State · 443 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.
870m
Depth
measured on the 30 m relief model
4.0km
Rim to rim
measured on the 30 m relief model
45°
Steepest wall
average over 300 m, from the relief
487m
Floor altitude
Rim to floor
6 °C warmer at the bottom.
In July the afternoon reaches 26 °C on the floor, against 19 °C on the rim. The best months to hike are in September. The rim freezes at night from November to March.
- 5°-1°Jan
- 7°0°Feb
- 11°5°Mar
- 16°9°Apr
- 19°13°May
- 24°17°Jun
- 26°19°Jul
- 25°19°Aug
- 21°15°Sep
- 17°10°Oct
- 10°4°Nov
- 6°-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 Guiers Mort is a canyon in France, cut by the Le Guiers Mort river. The relief model measures 870 m from the floor to the lower rim. Rim to rim it is 4.0 km wide where the cut was taken.
Getting there.
- Saint-Laurent-du-Pontnearest town · 5.0 km in a straight line
- Parking 70 m awaynearest car park in OpenStreetMap, straight line
- Belvédère de Nonenearest viewpoint · 1.0 km from the floor
- Chambéry Aix les Bains airport (CMF)nearest airport with scheduled flights · 33 km in a straight lineCar hire at GNB airport (Grenoble)Discover Cars · sponsored link↗
- In Septemberbest 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
2 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 9 × 9 km, north up. The line is the cut above. Points © OpenStreetMap contributors.
Around the canyon.
- 32viewpoints within 5 kmCharmant Som, Rocher de Lorzier, Col de la petite vache and 29 more
- 80marked hiking routes within 4 kmTraversée de la Chartreuse, Tour de Chartreuse and 78 more
- 9footbridges and suspension bridges within 3 kmPasserelle, Pont Peirent, Pont du Martinet and 6 more
- 11caves within 3 km
- 17car parks within 3 km
- 21information boards and visitor centres within 4 km
- 1bus stops within 2 km
- 7campsites within 8 kmAire de Stationnement camping-car du télésiège de la Combe de l'Ours, Saint-Pierre-de-Chartreuse, Le Couzon, Camping de Martinière and 4 more
- 38hotels and guesthouses within 8 kmCleyat, Chambres d'hôtes de Montbel, Le relais Dauphiné Savoie and 35 more
- 14restaurants and cafés within 4 km
- via ferrata routes within 4 km
- climbing crags within 3 km
- rafting, canoe, kayak or canyoning spots within 4 km
- swimming spots within 3 km
- named waterfalls 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
- Saint-Laurent-du-Pont5.0 km in a straight line
- Saint-Joseph-de-Rivière5.6 km in a straight line
- Entre-Deux-Guiers8.8 km in a straight line
- Saint-Aupre9.2 km in a straight line
- Saint-Étienne-de-Crossey9.6 km in a straight line
- Miribel-les-Échelles9.7 km in a straight line
- Les Échelles9.9 km in a straight line
- Coublevie12 km in a straight line
In our other atlases
What else is around Gorges du Guiers Mort.
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.
Peakyas45 mountains within 15 kmFigures 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 | 5 | 7 | 11 | 16 | 19 | 24 | 26 | 25 | 21 | 17 | 10 | 6 |
| 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 | 5 | -1 | -8 | 79 | 2.6 |
| Feb | 7 | 0 | -8 | 62 | 4.0 |
| Mar | 11 | 5 | -5 | 74 | 5.8 |
| Apr | 16 | 9 | -1 | 69 | 6.9 |
| May | 19 | 13 | 3 | 97 | 7.4 |
| Jun | 24 | 17 | 7 | 77 | 9.4 |
| Jul | 26 | 19 | 9 | 72 | 9.8 |
| Aug | 25 | 19 | 8 | 76 | 8.7 |
| Sep | 21 | 15 | 4 | 70 | 7.0 |
| Oct | 17 | 10 | 1 | 89 | 4.7 |
| Nov | 10 | 4 | -4 | 97 | 2.9 |
| Dec | 6 | -1 | -7 | 86 | 2.3 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the floor (487 m) and the rim (1,475 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 Guiers Mort
France
- 870 mDepth
- 4.0 kmRim to rim
- —Length
- 45°Steepest wall
Where these figures come from
| Name, type, published depth and length | Wikidata (Q3111015) · 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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