The Aiguille du Dru (also the Dru or the Drus; French, Les Drus) is a mountain in the Mont Blanc massif in the French Alps, lying to the east of the village of Les Praz in the Chamonix valley.
The mountain has two summits:
The two summits are located on the west ridge of the Aiguille Verte (4,122 m) and are connected to each other by the Brèche du Dru (3,697 m). The north face of the Petit Dru is considered one of the six great north faces of the Alps.
The first ascent of the Grand Dru was by British alpinists Clinton Thomas Dent and James Walker Hartley, with guides Alexander Burgener and K. Maurer, who climbed it via the south-east face on 12 September 1878. Dent describes the scene upon reaching the top:
The Petit Dru was climbed in the following year, on 29 August 1879, by J. E. Charlet-Straton, P. Payot and F. Follignet via the south face and the south-west ridge. The first traverse of both summits of the Drus was by E. Fontaine and J. Ravanel on 23 August 1901. The first winter traverse of the Drus was by Armand Charlet and Camille Devouassoux on 25 February 1938.
On 4 September 1913 a party of climbers led by Camille Simond and Roberts Charlet-Straton attempted to carry a hollow metal statue of Our Lady of Lourdes up the peak. The statue, almost a metre high, weighing 13 kilos and made of aluminium, had to be left in a rocky crevice at 3,000 m because of poor weather, and it was only on 18 September 1919 that the statue was finally hoisted to the summit by a party from Argentière: Alfred, Arthur, Camille, Joseph, and Jules-Félicien Ravanel together with the village priest, abbé Alexis Couttin.