Route Guides · Mont Blanc massif, France
Grand Balcon Nord, Chamonix: how hard is it, and what to expect
How hard is the Grand Balcon Nord above Chamonix, and what to expect: the real figures, the five-axis difficulty, the downhill traverse, and timing.
The Datum Heights Desk · 8 min read
The Grand Balcon Nord is the walk where you stop looking at the Mont Blanc massif and step into it. Instead of watching the glaciers from the sunny side of the valley, you traverse the massif's own flank, from the mid-station of the Aiguille du Midi cable car at 2,317 m, along a balcony above the Mer de Glace, to the old Montenvers railway.
A lift carries you in and a train carries you out, which makes it one of the most accessible high-altitude walks in the Alps. It is also more serious than that accessibility suggests. So here is the plain version: how hard it is, which way to walk it, how long it takes, and who it suits.
Quick facts: about 5.7 to 6.8 km point to point. Net descent in the recommended direction (roughly 235 m up, 620 m down). High point 2,317 m at Plan de l'Aiguille. About 2 h 30 to 3 h. SAC T3 (our read). Aiguille du Midi cable car in, Montenvers train out.
Key takeaways
- Walk it downhill, Plan de l'Aiguille to Montenvers. The reverse is a strenuous 600 m climb.
- It is lift-and-train dependent at both ends. Book the Aiguille du Midi ahead, and do not miss the last Montenvers train (around 5 to 5:30 pm).
- The ground is rough and genuinely exposed in places: rocky switchbacks, stone slabs, and a narrow path that drops away across steep gullies.
- This is the glacier-edge, big-mountain side of Chamonix: higher, rawer, and more weather-committing than the balcony trails across the valley.
Difficulty: the honest read
No single grade captures a route like this, so here is the Grand Balcon Nord on five axes, 1 to 10. This is the desk's read of the standard downhill traverse in summer, confirmed first-hand. See how we read difficulty on five axes.
| Axis | /10 | The read |
|---|---|---|
| Physical | 3 | Modest downhill, only about 235 m of climbing, but the long, rough descent on stone slabs works the legs. Reversed, it becomes a strenuous 600 m ascent, closer to a 5. |
| Technical | 3 | Walking, but on rough, uneven ground: rocky switchbacks and stone slabs, not a smooth path. No scrambling, but sure feet matter. |
| Exposure | 4 | The standout. A narrow section crosses steep gullies where the ground drops away sharply, real consequence beside the path. |
| Environment | 5 | High alpine on the massif at 2,300 m, glacier-edge, fully sun-exposed, thunderstorm-prone. Committing, because both ends depend on a lift and a train with a hard last departure. |
| Navigation | 2 | Well-marked and heavily walked, with a signed junction for the Signal Forbes variant. Cloud on the traverse is the only real complication. |
On the SAC scale this reads as a T3: a marked mountain trail with rougher ground and exposed sections where a slip has consequences. Much of the walking is closer to T2, and the narrow gully crossing carries the grade. (See SAC Hiking Scale.)
Which direction to walk it
This is the one decision that changes the day. A lift serves one end and a cog railway the other, so you can walk it either way, but they are not the same walk.
Walk it from Plan de l'Aiguille to Montenvers. Ride the Aiguille du Midi cable car to its mid-station at 2,317 m and traverse down to Montenvers at 1,913 m: net descent, modest climbing, and a train home at the finish. The reverse, from Montenvers, means climbing roughly 600 m back up to the cable-car station. That is genuinely strenuous, and only worth it if a queue or a timing constraint forces your hand.
The route
From the Plan de l'Aiguille mid-station the balcony trail sets off across the flank of the massif, the Aiguille du Midi above and the valley dropping away below. Trackers put the traverse at about 5.7 km direct, or 6.6 to 6.8 km via the higher Signal Forbes variant (2,198 m), which most walkers should take. That upper loop adds a little climbing for the finest views of the day: straight down onto the Mer de Glace, France's largest glacier, with the spires of Les Drus behind.
The ground is rough and honest: rocky switchbacks, stretches of large stone slabs, and a narrow passage across steep gullies where the slope falls away. It is fully exposed to the sun for most of its length, with little shade and no water. The Chamonix tourist office and independent guides give the downhill traverse around 2 h 30 to 3 h, a touch more with the Signal Forbes loop and stops (en.chamonix.com, cross-checked against earthtrekkers.com and seechamonix.com, retrieved 2026-08-27). You finish at Montenvers (1,913 m), where the rack railway has run up from Chamonix since the nineteenth century, and where you can visit the ice grottoes carved into the glacier before the train down.
Conditions and season
Walk it from July through September, once snow has cleared the exposed sections. Both the cable car and the railway run on published summer schedules, so the walk is only as open as they are.
The deadline is the thing to plan around. The Aiguille du Midi cable car needs advance booking in summer, and you ride only to the mid-station. At the far end, the last Montenvers train leaves in the late afternoon, commonly around 5 to 5:30 pm, and missing it means a long descent on foot. Confirm both timetables the day before and build in margin. Afternoon thunderstorms are common over the massif, and the traverse is exposed with nowhere to shelter, so start early, watch the sky, and treat the last train as a hard turnaround, not a target.
Who is this route for?
Fit beginners can do it with real caution: the lifts remove the climb, but the exposure, the altitude, and the fixed last-train deadline make it less forgiving than a valley walk, so go in settled weather and start early. For intermediate hikers it is a classic balcony traverse and a proper introduction to the massif's scale. Experienced walkers will find it short and superb, easily extended, and the glacier-side counterpart to the sunny Aiguilles Rouges balconies.
Frequently asked questions
How hard is the Grand Balcon Nord hike?
Walked downhill from Plan de l'Aiguille to Montenvers, it is a moderate high-alpine traverse of about 5.7 to 6.8 km, with only around 235 m of climbing but a long, rough descent. On the SAC scale it reads as a T3: mostly straightforward walking with a narrow, genuinely exposed section across steep gullies that carries the grade. Respect the altitude, the sun, and the last-train deadline.
Which direction should you walk the Grand Balcon Nord?
Plan de l'Aiguille to Montenvers, downhill. Take the Aiguille du Midi cable car to its mid-station (2,317 m) and traverse down to the railway (1,913 m). The other way, from Montenvers, is a strenuous 600 m climb.
How long does the Grand Balcon Nord take?
About 2 h 30 to 3 h downhill, a little more with the Signal Forbes variant and stops for the Mer de Glace. Plan around the last Montenvers train, which leaves in the late afternoon.
Is the Grand Balcon Nord suitable for beginners?
With care. The lift and train remove the hardest climbing, but this is exposed, high-alpine ground with a section that drops away sharply, and both ends depend on scheduled transport. A fit, sure-footed beginner who starts early in settled weather and watches the last train will manage it.
Now prepare
- Work out whether it suits you, with time and turnaround, using the honest hike planner.
- Size up the traverse for your own pace with the hike-time calculator, built on Naismith's rule and its corrections.