| Birth Date: | 2 April 1901 |
| Birth Place: | Camberwell, London, Great Britain |
| Death Date: | 30 April 1985 (aged 84) |
| Death Place: | Grahamstown, Eastern Cape, South Africa |
| Height: | 1.67m (05.48feet) |
| Weight: | 60kg (130lb) |
| Sport: | Athletics |
| Event: | 800 m |
| Club: | Surrey AC, Kingston-upon-Thames; University of Cambridge |
| Pb: | 800 m – 1:53.8e (1920) |
| Alma Mater: | University of Cambridge |
| Show-Medals: | yes |
Edgar Donald Mountain (2 April 1901 – 30 April 1985) was a British middle-distance runner.[1] He competed in the 800 m event at the 1920 and 1924 Summer Olympics and finished fourth in 1920, setting a British junior record.
After the 1924 Olympics Mountain settled in South Africa and later became a specialist in South African geological formations and professor at Rhodes University. He discovered several minerals, and one them, mountainite, bears his name.
Mountain was educated at Sutton Valence School.[2]