A seven-man team made the first ascent of the Matterhorn, marking the end of the golden age of alpinism.

The first ascent of the Matterhorn was a mountaineering expedition of the Matterhorn made by Edward Whymper, Lord Francis Douglas, Charles Hudson, Douglas Hadow, Michel Croz, and two Zermatt guides, Peter Taugwalder and his son of the same name, on 14 July 1865. Douglas, Hudson, Hadow and Croz were killed on the descent when Hadow slipped and pulled the other three with him down the north face. Whymper and the Taugwalder guides, who survived, were later accused of having cut the rope below to ensure that they were not dragged down with the others, but the subsequent inquiry found no evidence of this and they were acquitted.

The Matterhorn is a mountain of the Alps, straddling the main watershed and border between Switzerland and Italy. It is a large, near-symmetric pyramidal peak in the extended Monte Rosa area of the Pennine Alps, whose summit is 4,478 metres (14,692 ft) above sea level, making it one of the highest summits in the Alps and Europe. Sometimes referred to as the "Mountain of Mountains", it has become an indelible emblem of the Alps and stands as the most photographed mountain in the world. The Matterhorn has four faces, each roughly oriented toward one of the four cardinal points. Three of these are on the Swiss side of the border and watershed, while the south face lies on the Italian side. These four steep faces, rising above the surrounding glaciers, are separated by the Hörnli, Furggen, Zmutt, and Leone (Lion) ridges. The mountain overlooks the Swiss town of Zermatt, in the canton of Valais, to the northeast; and the Italian town of Breuil-Cervinia in the Aosta Valley to the south. Just east of the Matterhorn is Theodul Pass, the main passage between the two valleys on its north and south sides, which has been a trade route since the Roman era.

The golden age of alpinism was the decade in mountaineering between Alfred Wills's ascent of the Wetterhorn in 1854 and Edward Whymper's ascent of the Matterhorn in 1865, during which many major peaks in the Alps saw their first ascents.