Boucle des Mattes
MODERATE (1.8/10)Circular route from Très les Pierres
Use this route
The walk, as far as the open data goes
Height and time
- High point 1,914 m
- Low point 1,193 m
- Climb 751 m from a 30 m terrain model, smoothed
- Swiss signpost time 3 h 51 the official method, on our line
Computed on 2026-09-20 from OpenStreetMap, the terrain model and the federal route layer — not read from the operator's own page, and not checked on the ground. Hikes we have reviewed say who published each fact and when.
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Route briefing
What comes next
Climbs, descents and decisive places in route order. Not listed does not mean absent: it may not be mapped.
Start
0 m
Très les Pierres
Start
Route geometry · source 2026-04-10
About 0 min in
9.6 km remaining
+751 m remaining
Climb
0 m
709 m climb
4.0 km at 17.8% average
OpenStreetMap route data · source 2026-04-10
About 0 min in
9.6 km remaining
+751 m remaining
Route note
3.5 km
Mont de Grange
Peak
OpenStreetMap · source 2026-04-10
About 1h 30m in
6.1 km remaining
+71 m remaining
Descent
4.0 km
176 m descent
1.1 km at 16.6% average
OpenStreetMap route data · source 2026-04-10
About 1h 42m in
5.6 km remaining
+47 m remaining
Route note
4.2 km
Pointe des Mattes
Peak
OpenStreetMap · source 2026-04-10
About 1h 47m in
5.4 km remaining
+47 m remaining
Descent
5.5 km
579 m descent
4.1 km at 14.2% average
OpenStreetMap route data · source 2026-04-10
About 2h 21m in
4.1 km remaining
+4 m remaining
Finish
9.6 km
Très les Pierres
Finish
Route geometry · source 2026-04-10
About 4h 06m in
0 m remaining
Trail route lab
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Boucle des Mattes is a 9.6 km circular moderate hiking route in Switzerland, starting and finishing at Très les Pierres. The route covers 751m of ascent and 870m of descent, with elevations ranging from 1,192m to 1,912m. Allow approximately 4h 05m for the full route.
The route is divided into 4 segments. The toughest stretch is the 3.5 km from Très les Pierres to Mont de Grange, climbing 730m.
About 60% of the trail is runnable, but the remaining steep sections will push most people into power-hiking mode. The steepest pitches reach 50% gradient.
Budget roughly 2,219 kcal of energy expenditure and 2.5 L of water.
Mid-altitude route up to 1913m. Accessible May–October.
Trail Splits
Waypoint-to-waypoint breakdown with estimated hiking times (Naismith's Rule).
| Segment | Dist | ↑ Ascent | ↓ Descent | Time | Cum. km |
|---|---|---|---|---|---|
📍 Très les Pierres → Mont de Grange | 3.5 km | +730m | -37m | 1h 56m | 3.5 |
⛰️ Mont de Grange → Tête de la Torrens | 1.1 km | +36m | -148m | 24 min | 4.6 |
⛰️ Tête de la Torrens → Le Rocher Blanc | 0.7 km | +17m | -50m | 12 min | 5.3 |
⛰️ Le Rocher Blanc → Très les Pierres | 4.3 km | +87m | -635m | 1h 32m | 9.6 |
| Total | 9.6 km | +751m | -870m | 4h 05m | 9.6 |
Pace & Fuel Calculator
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Terrain Analysis
Surface & Technicality
Gradient describes steepness, not exposure, scrambling, footing or current conditions. Technical difficulty is unknown where no mapped rating is available.
Tree cover and UV
🌤️ Mixed. Sections above the treeline are open to the sky; lower sections have some canopy. Carry sun protection for the open parts.
Canopy is inferred from elevation against a 2000 m Alpine treeline and from gradient below it, not from observed tree data — treat it as an estimate. It is a different question from the terrain shade above, which is about whether a mountain is between you and the sun at a given time.
Current Conditions
Based on 1991–2020 climate averages, the weather on Boucle des Mattes is usually best from June to September. Snow is likely at the high point (1914 m) in December to May.
Weather this week
Loading the forecast for low point (1,193 m) and high point (1,914 m)…
Weather by month
Typical weather on this trail: at the lowest point (1,193 m) and the highest point (1,914 m). Select a month to see why it is rated as it is.
| Month | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather | Poor | Poor | Poor | Poor | Poor | Good | Good | Good | Good | Mixed | Poor | Poor |
| High point, day / night | -2°/-8° | -2°/-9° | 2°/-6° | 6°/-2° | 11°/2° | 14°/5° | 16°/6° | 16°/7° | 12°/4° | 8°/1° | 2°/-3° | -1°/-7° |
| Low point, day / night | 3°/-5° | 3°/-5° | 7°/-2° | 11°/1° | 15°/6° | 19°/9° | 21°/10° | 21°/11° | 16°/7° | 12°/5° | 7°/0° | 4°/-3° |
| Rain, mm | 128 | 114 | 98 | 97 | 125 | 118 | 113 | 108 | 99 | 113 | 125 | 154 |
| Snow at high point | Likely | Likely | Likely | Likely | Likely | – | – | – | – | Possible | Possible | Likely |
| Daylight | 8 h 59 | 10 h 19 | 11 h 49 | 13 h 30 | 14 h 56 | 15 h 46 | 15 h 28 | 14 h 14 | 12 h 38 | 11 h | 9 h 29 | 8 h 39 |
Source: TerraClimate 1991–2020 monthly averages. Averages for the area at each point’s elevation (4 km grid, corrected for height). Not a forecast or a report of current trail conditions. These values describe the whole trail's lowest and highest points. Snow at the high point is estimated with a simple snowpack model from these temperatures and precipitation, not observed; steep islands and high summits can hold more snow than it shows. Daylight is for the 15th of each month. Hut, transport and park seasons are separate: check them for your dates.
Averages cannot establish current trail conditions. Check recent local reports, the forecast and restrictions before departure. Snow and ice can persist on shaded sections or arrive outside the usual season.
Current snow conditions
Insufficient evidence
Enable “Current snow map” in the route map’s Map layers to see the surrounding snow evidence. Current conditions do not describe a future departure date.
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Safety & Bailouts
We do not have a verified emergency exit plan for this route. A nearby settlement, hut or route endpoint is not necessarily reachable or open. Do not leave the trail based on a straight-line distance or compass direction.
Review possible exits against current local information before your trip. In an emergency, contact local rescue services; this page is not live rescue guidance.
Suggested Gear List
Auto-generated based on 9.6 km, 751m ascent, max altitude 1912.8m, ~4h duration.
- 👟 Trail running shoes / hiking bootsRequired for any trail
- 📱 Phone (charged) + offline mapNavigation & emergency contact
- 💧 3L hydration vestWater source information is incomplete; plan supplies before departure
- 🍫 Trail mix, bars & sandwichEst. 2219 kcal burn
- 🧴 Sunscreen SPF 50+UV intensifies above 1500m
- 🧢 Sun hat / capExposed alpine terrain
- 🕶️ Sunglasses (cat 3+)Snow & rock glare at altitude
- 🧥 Light rain jacketWeather changes fast in the mountains
- 🩹 Mini first aid kitBlister plasters, tape, antiseptic
- 🥢 Trekking poles57% steep terrain, 751m+ ascent
- 🧊 Microspikes / light cramponsSnow risk in Jan, Feb, Mar
- 🦵 GaitersKeep snow out of boots
Nearby Points of Interest
⛰️ Peaks
- Tête de la Torrens km 4.6 · 1.3 km off trail
- Pointe des Mattes km 4.2 · 921m off trail
- Mont de Grange km 3.5 · 1.2 km off trail
📍 Nearby Places
- Sur le Crac km 1.1 · 972m off trail
- La Corne 1.1 km off trail
- L'Aity d'en Bas km 8.8 · 1.1 km off trail
- L'Aity d'en Haut 1.3 km off trail
- L'Envers km 1 · 1.5 km off trail
Route Details
- Network
- Local Trail Network
- Sport
- hiking
- Start
- Très les Pierres
- End
- Très les Pierres
- Start Coordinates
- 46.25067, 6.80870
- OpenStreetMap
- View on OSM →
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Route resources
Specialist links and source details for this route. Everyday actions are kept in the route rail above.