Chemins pédestre de montagne, commune d'Orsières

HARD (3.9/10)

Combe d'Orny → Glacier du Trient

Distance
12.6 km
Ascent
+2,296 m
Descent
-917 m
Est. Time
7h 47m
Altitude
1,474.1–2,932.2 m
Type
point-to-point
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Chemins pédestre de montagne, commune d'Orsières is a 12.6 km point-to-point hard hiking route in Switzerland, running from Combe d'Orny to Glacier du Trient. The route covers 2,296m of ascent and 917m of descent, with elevations ranging from 1,474m to 2,932m. Allow approximately 7h 47m for the full route.

The route is divided into 5 segments. The toughest stretch is the 10.8 km from Combe d'Orny to La Breya, climbing 1,534m (allow 5h 24m for this section).

About 61% of the trail is runnable, but the remaining steep sections will push most people into power-hiking mode. Some pitches hit 60% gradient, so trekking poles are strongly recommended.

Budget roughly 5,782 kcal of energy expenditure and 4.7 L of water.

High-alpine route reaching 2932m. Typically accessible July–September.

Elevation Profile

1,600m1,800m2,000m2,200m2,400m2,600m2,800m3,000m0 km2 km4 km6 km8 km10 km12 km13 km2,932m1,477m
Steep (15–25%) Flat (<5%) Easy (5–10%) Moderate (10–15%) Very Steep (>25%)

Route Map

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Trail Splits

Waypoint-to-waypoint breakdown with estimated hiking times (Naismith's Rule).

SegmentDist↑ Ascent↓ DescentTimeCum. km
📍
Combe d'Orny → La Breya
10.8 km+1534m-824m5h 24m10.8
⛰️
La Breya → Le Châtelet
2.2 km+256m-85m55 min13.0
⛰️
Le Châtelet → Petit Clocher du Portalet
1.7 km+342m-0m54 min14.7
⛰️
Petit Clocher du Portalet → Aiguille d'Orny
1.1 km+146m-4m27 min15.7
⛰️
Aiguille d'Orny → Glacier du Trient
0.3 km+17m-3m5 min16.0
Total12.6 km+2,296m-917m7h 47m12.6

Pace & Fuel Calculator

Adjust your flat 10K pace to see personalized finish time, calorie burn, and hydration needs.

7:00 /km
4:00 /km (elite) 12:00 /km (leisure)
Fast Hiker / Jogger
Est. Finish Time
4h 44m
Calories
4,875 kcal
Water Needed
4 L
Effort Distance
40.1 km
flat-equivalent
🍫 Recommended: ~45g carbs/hr (213g total) 🧂 Electrolytes: ~2369mg sodium/hr

Terrain Analysis

Runnability
61%
Runnable
% of route below 15% gradient
Climb Ratio
183 m/km
Very steep profile
↑ 2,296m ↓ 917m
High Point
2,932.2 m
High alpine zone
Low point: 1,474.1m — Range: 1,458.1m

Surface & Technicality

Terrain Difficulty Breakdown
Runnable Flat (11%) Easy Grade (18%) Moderate Climb (21%) Steep (21%) Very Steep / Technical (29%)

⛰️ Highly technical route. Power-hiking the steep sections is expected.

Sun Exposure

☀️ High Exposure 90% exposed · 10% shaded
Route shade profile
Forest/shaded (10%) Open terrain (17%) Above treeline (73%)
South-facing: 43% of route

☀️ High sun exposure. 73% of the route is above the treeline (2000m) with minimal shade. In summer, start before 7am to avoid peak UV. Carry sunscreen, a hat, and extra water.

Current Conditions

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Conditions for June

⚠️ Snow risk month
Snow Risk
20%
Low
54% north-facing slopes
Mud Risk
30%
Moderate
Ice Risk
0%
Unlikely

🌤️ Occasional snow patches possible above 2492m. Trail should be mostly clear but carry microspikes just in case.

🥾 Muddy sections likely. Waterproof boots recommended.

Best months: July, August, September

Snow Conditions

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Suggested Gear List

Auto-generated based on 12.6 km, 2296m ascent, max altitude 2932.2m, ~8h duration.

Essential 8 items
  • 👟
    Trail running shoes / hiking boots
    Required for any trail
  • 📱
    Phone (charged) + offline map
    Navigation & emergency contact
  • 💧
    3L hydration vest
    No water sources on route
  • 🍫
    Trail mix, bars & sandwich
    Est. 5782 kcal burn
  • 🧴
    Sunscreen SPF 50+
    UV intensifies above 2000m
  • 🧢
    Sun hat / cap
    Exposed alpine terrain
  • 🧥
    Windbreaker / shell jacket
    Summit at 2932.2m — wind chill
  • 🆘
    Emergency space blanket
    Critical if injured at altitude
Recommended 6 items
  • 🕶️
    Sunglasses (cat 3+)
    Snow & rock glare at altitude
  • 🧤
    Warm mid-layer (fleece)
    Temps drop ~6°C per 1000m
  • 🔦
    Headlamp
    8h route — plan for delays
  • 🩹
    Mini first aid kit
    Blister plasters, tape, antiseptic
  • 🥢
    Trekking poles
    50% steep terrain, 2296m+ ascent
  • 🧊
    Microspikes / light crampons
    Snow risk in October, November, December
Nice to have 1 items
  • 🦵
    Gaiters
    Keep snow out of boots

Logistics

This route runs from Combe d'Orny to Glacier du Trient (12.6 km by trail). You'll need to arrange transport back to your starting point.

Start — Getting There
Combe d'Orny
No transit stops detected nearby.
Finish — Getting Back
Glacier du Trient
No transit stops detected nearby. Check local timetables.
🗺️ Transit directions (Google)

Nearby Points of Interest

⛰️ Peaks

  • La Breya km 10.8 · 1.1 km off trail
  • Le Châtelet km 13 · 1.6 km off trail
  • Aiguille de la Cabane km 14.3 · 2.2 km off trail
  • Aiguille d'Arpette km 15 · 2.1 km off trail

📍 Nearby Places

  • Plan Raveire km 0.8 · 938m off trail
  • Grands Plans km 10.4 · 1.1 km off trail
  • L'Affe km 1.4 · 1.2 km off trail
  • Le Niolet km 1.6 · 1.5 km off trail

Route Details

Network
Local Trail Network
Sport
hiking
Start
Combe d'Orny
End
Glacier du Trient
Start Coordinates
46.01186, 7.10810
OpenStreetMap
View on OSM →

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