Alison Jane Hargreaves (17 February 1962 – 13 August 1995) was a British mountain climber. Her accomplishments included scaling Mount Everest alone, without supplementary oxygen or support from a Sherpa team, in 1995. She soloed all the great north faces of the Alps in a single season—a first for any climber. This feat included climbing the difficult north face of the Eiger in the Alps, in 1988. Hargreaves also climbed 6,812-metre (22,349 ft) Ama Dablam in Nepal.
In 1995, Hargreaves intended to climb the three highest mountains in the world—Mount Everest, K2, and Kangchenjunga—unaided. On 13 May 1995, she reached the summit of Everest without the aid of Sherpas or bottled oxygen. On August 13, she was killed while descending from the summit of K2.