Three turquoise mountain lakes sitting at around 2,500m elevation, right on the Swiss-Italian border. The water color is genuinely unreal. From the lakes you get a direct view of Mont Blanc massif, Grandes Jorasses, and Mont Dolent. The first lake sits at 2,456m, and you'll pass all three within about 20 minutes of walking. One of them looks heart-shaped.

How to get there

🚗 45min drive from Martigny to Grand-St-Bernard Pass (2,469m). Free parking at the pass

🚞 Train to Martigny → Orsières → Bus 210 to Grand-St-Bernard Pass (2-3 buses daily June-Sept, 48min from Orsières)

• Trail starts near the hospice, follow signs "Lacs de Fenêtre" (2-2.5h up)

• Alternative: Start from Ferret village for a longer, quieter approach

Routes

• Hike the classic loop from Grand-St-Bernard Pass (13km, 1000m elevation gain, 5-7 hours)

• Alternative: Start from Ferret village (1,700m), hike up to lakes, continue to pass (10.6km, 5 hours)

Tips

• Start early (before 9am)

• Weather critical: Trail can be dangerous in fog - download GPS track beforehand

• Snow warning: Snow patches can persist on trails into early July

• Trail crosses into Italy briefly - better to bring an ID just in case

• Water is freezing but swimmable