The two summits are on the west ridge of the Aiguille Verte and are connected to each other by the Brèche du Dru. The north face of the Petit Dru is considered one of the six great north faces of the Alps. The southwest "Bonatti" pillar and its eponymous climbing route were destroyed in a 2005 rock fall.
Ascents
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, in his description of the climb, wrote: 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. In 1889 both peaks of the Dru were climbed for the first time from the Petit Dru to the Grand Dru by two parties. One party contained Katharine Richardson and guides Emile Rey and Jean-Baptiste Bich, and the other Mr Nash and Mr Williams with guides François Simond, Frederic Payot and Edouard Cupelin.
The west and south-west faces
These 1000 m-high rock faces have seen serious rockfalls in 1950, 1997, 2003, 2005 and 2011, which have considerably affected the structure of the mountain and destroyed a number of routes. Although at the time of the first ascent of the north face, Pierre Allain considered the west face to be unclimbable, the team of A. Dagory, Guido Magnone, Lucien Bérardini and Marcel Lainé succeeded on the face in a series of attempts on 5 July and 17–19 July 1952 using considerable artificial aid. From 17–22 August 1955, the Italian climber Walter Bonatti climbed a difficult solo route on the south-west pillar of the Petit Dru ; this route – like many on the west face – no longer exists in its original state owing to rockfall, the scars of which remain clearly visible from the Chamonix valley. Seven years later, from 24–26 July 1962, Gary Hemming and Royal Robbins climbed the 'American Direct', a more direct route up the west face than that taken in 1952. On 10–13 August 1965, Royal Robbins, this time accompanied by John Harlin, climbed the 'American Direttissima'. This route was destroyed by the 2005 rockfall.
1966 rescue
In 1966 two German climbers became stuck on a climb of the west face. Attempts to rescue them were made by three teams, including climbers such as Gary Hemming who were in the area and had climbed the face themselves. The rescue extended over seven days and received international press and TV coverage. The two climbers were rescued but a companion involved in the rescue died in the attempt.
Summit statue
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.
