Tour du Mont Blanc Navigation Guide: Maps, GPS & Waymarks

The main Tour du Mont Blanc loop is well waymarked — red-and-white TMB markers through France, Italy and Switzerland. That does not mean you can wing it: variants, weather and marker conflicts caught us out on day 2. This guide covers maps, GPS, permits and what actually worked on our self-guided hike.

Also read: Complete TMB Guide · Itinerary · Official Swiss diversion (Autour du Mont-Blanc) · Difficulty

Navigation at a glance

Question	Answer
Waymarked?	Yes — excellent on main TMB
Permit required?	No general trekking permit for the standard summer route
Offline maps needed?	Strongly recommended
Paper map?	Useful backup; we relied on digital
GPS watch?	Very helpful on variants
Phone signal?	Patchy at cols; don’t depend on live data

Waymarking on the TMB

The classic loop uses red-and-white paint marks (GR-style) plus TMB-specific signage at junctions.

On the main route:

• Follow TMB / Tour du Mont Blanc signs at splits
• Markers are frequent in busy sections (France, Val Ferret)

Where it gets tricky:

• Variants share junctions with the main trail — Robert Blanc, Fenêtre d’Arpette, Col des Fours
• Multiple paths into Courmayeur and Champex
• Snow can obscure markers early/late season

Lesson from day 2: We followed paint marks instead of our downloaded map and descended the wrong side of the mountain — adding hours. After that we trusted GPS over markers on variants.

Maps & apps we used

AllTrails (primary)

We downloaded the Tour du Mont Blanc loop on AllTrails for offline use (Pro subscription). This was our main navigation tool.

Garmin watch

GPS track on a Garmin Fenix gave quick elevation, distance and route confirmation — especially when the phone stayed in the pack. See packing list for gear notes.

Paper backup (optional)

• IGN / SwissTopo sheets or a Cicerone guidebook map
• Kompass or Michelin alpine maps for the full loop
• Not required if digital backups are solid — but nice if your phone dies

Route variants & navigation

Variant	Nav difficulty	When to use
Bellevue cable car (day 1)	Easy	Skip first climb — clear signage to join TMB
Robert Blanc (days 2–3)	Hard	Clear weather only; download dedicated GPX
Lacs Jovet / Col des Fours	Moderate–hard	Alternative high routes
Fenêtre d’Arpette (day 8)	Hard	Snow-free conditions; exposed
Mont de la Saxe ridge	Moderate	Bonatti–Courmayeur views

Rule: Attempt variants only with offline maps, stable weather and exit plan to the main trail.

Permits & regulations

Trekking permits

The standard summer TMB hiking route does not require a trekking permit for independent walkers. You book refuges, not a trail licence.

Areas to be aware of

• Swiss diversion — Prayon to Branche (Treutsebo) — from 11 July 2026, follow the official waymarked diversion only; the previous line is closed for rockfall safety (Autour du Mont-Blanc). No wild camping or bivouac in this sector — use designated campings such as Camping des Glaciers (La Fouly) or Rocailles / Relais d’Arpette as listed by the authority.
• Aiguilles Rouges Nature Reserve — stay on marked paths; no wild camping
• Border crossings (FR/IT/CH) — carry ID; no formal border post on trail
• Camping — restricted; use designated campsites or refuge tents where offered
• Drones — regulations vary by country and reserve; check locally

Refuge booking ≠ trail permit

Your refuge reservation is accommodation only. It does not replace navigation preparation.

Practical navigation kit

From our packing list:

• Phone with offline maps (AllTrails or equivalent)
• GPX files for planned variants
• GPS watch or second device backup
• Power bank (10,000 mAh+)
• Headlamp for early/late hut arrivals
• Whistle
• Paper map or guidebook (optional)

Weather & route decisions

Navigation and weather are linked on the TMB.

We shortened day 9 in sleet — navigation mattered less than knowing the escape (lift + tent refuge).

Trailheads & direction

The traditional start is Les Houches (see getting there). The loop works clockwise or anti-clockwise — book refuges in your walking order.

Key junctions to study beforehand:

• Les Houches / Bellevue cable car
• Col du Bonhomme vs Robert Blanc split
• Courmayeur / Val Ferret
• La Fouly → Champex-Lac (Prayon–Branche diversion from Jul 2026) — check official TMB conditions before you leave La Fouly
• Champex — Bovine vs Arpette
• Col de Balme (France re-entry)
• La Flégère ladders vs cable car down

Navigation mistakes to avoid

1. Relying on markers alone on variants — carry offline GPS
2. No backup battery — cold cols kill phone charge
3. Starting Arpette in bad weather — turn onto Bovine early
4. Assuming signal — download everything in Chamonix
5. Ignoring refuge advice — hut keepers know daily conditions

Related planning

• Difficulty — who should attempt variants
• Itinerary — stage distances and escape options
• Packing list — GPS watch, power bank, headlamp
• Trek overview — distance, elevation, tools