Boucle des Trois Vallées
EASY (1.5/10)Circular route from Bois Grapatte
Use this route
The walk, as far as the open data goes
Height and time
- High point 527 m
- Low point 399 m
- Climb 317 m from a 30 m terrain model, smoothed
- Swiss signpost time 3 h 00 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.
Explore the route
Read the topography, inspect the climb, or preview the route over real terrain.
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
Bois Grapatte
Start
Route geometry · source 2026-04-10
About 0 min in
9.3 km remaining
+317 m remaining
Climb
860 m
65 m climb
0.6 km at 10.9% average
OpenStreetMap route data · source 2026-04-10
About 17 min in
8.4 km remaining
+288 m remaining
Descent
1.4 km
118 m descent
1.7 km at 6.8% average
OpenStreetMap route data · source 2026-04-10
About 29 min in
7.8 km remaining
+220 m remaining
Climb
3.8 km
98 m climb
1.7 km at 5.8% average
OpenStreetMap route data · source 2026-04-10
About 1h 16m in
5.5 km remaining
+205 m remaining
Descent
5.4 km
74 m descent
1.2 km at 6.1% average
OpenStreetMap route data · source 2026-04-10
About 1h 49m in
3.8 km remaining
+104 m remaining
Climb
6.7 km
65 m climb
1.0 km at 6.3% average
OpenStreetMap route data · source 2026-04-10
About 2h 14m in
2.6 km remaining
+104 m remaining
Finish
9.3 km
Bois Grapatte
Finish
Route geometry · source 2026-04-10
About 3h 07m in
0 m remaining
Trail route lab
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Boucle des Trois Vallées is a 9.3 km circular easy hiking route in Switzerland, starting and finishing at Bois Grapatte. The route covers 317m of ascent and 319m of descent, with elevations ranging from 399m to 519m. Allow approximately 3h 06m for the full route.
With 94% of the route below 15% gradient, strong trail runners can maintain a good rhythm for much of the distance.
Budget roughly 1,445 kcal of energy expenditure and 1.9 L of water.
Low-altitude route (max 520m). Hikeable most of the year.
Segment Breakdown
Auto-analyzed from the elevation profile. Each segment shows the dominant character for planning your effort.
| Segment | Dist | ↑ / ↓ | Time | Character |
|---|---|---|---|---|
Bois Grapatte → km 5.4 (498m) 400–520m | 5.4 km | +207m / -167m | 1h 51m | 🏃 Highly Runnable |
km 5.4 (498m) → Bois Grapatte 423–498m | 3.9 km | +102m / -142m | 1h 15m | 🏃 Highly Runnable |
| Total | 9.3 km | +317m / -319m | 3h 06m |
Pace & Fuel Calculator
Adjust your flat 10K pace to see personalized finish time, calorie burn, and hydration needs.
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
🌲 Largely under trees. Good canopy at lower elevations, so the open sections are the ones to plan for.
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 Trois Vallées is usually best from March to November.
Weather this week
Loading the forecast for on the trail (463 m)…
Weather by month
Typical weather on this trail, around 399–527 m. Select a month to see why it is rated as it is.
| Month | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather | Mixed | Mixed | Good | Good | Good | Good | Good | Good | Good | Good | Good | Mixed |
| Day / night | 4°/-2° | 5°/-2° | 10°/1° | 14°/4° | 18°/8° | 22°/11° | 24°/13° | 24°/13° | 19°/9° | 14°/6° | 8°/2° | 5°/-1° |
| Rain, mm | 81 | 71 | 67 | 63 | 92 | 82 | 85 | 78 | 86 | 91 | 88 | 102 |
| Snow at high point | Possible | Possible | Frost | – | – | – | – | – | – | – | Frost | Possible |
| Daylight | 8 h 51 | 10 h 14 | 11 h 49 | 13 h 34 | 15 h 04 | 15 h 56 | 15 h 37 | 14 h 20 | 12 h 39 | 10 h 58 | 9 h 22 | 8 h 29 |
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 9.3 km, 317m ascent, max altitude 519.8m, ~3h duration.
- 👟 Trail running shoes / hiking bootsRequired for any trail
- 📱 Phone (charged) + offline mapNavigation & emergency contact
- 💧 2L hydration packWater source information is incomplete; plan supplies before departure
- 🍫 Energy bars & gelsEst. 1445 kcal burn
- 🧴 SunscreenBasic sun protection
- 🩹 Mini first aid kitBlister plasters, tape, antiseptic
- 🧊 Microspikes / light cramponsSnow risk in Jan, Feb, Dec
- 🦵 GaitersKeep snow out of boots
Nearby Points of Interest
📍 Nearby Places
- La Combe km 3.4 · 566m off trail
- Bois de Porrentruy km 1.5 · 624m off trail
- Bois Sesmont km 0.8 · 664m off trail
- Côteau du Val km 0.8 · 706m off trail
- Combe Bernard km 0.8 · 833m off trail
Route Details
- Network
- Local Trail Network
- Sport
- hiking
- Start
- Bois Grapatte
- End
- Bois Grapatte
- Start Coordinates
- 47.47953, 6.97554
- 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.