Derek Philip Fraser Turnbull QSM (5 December 1926 – 2 November 2006) was a New Zealand middle- and long-distance runner.
[1] He became a farmer, and owned and farmed 105 hectares at Tussock Creek, 30 km north of Invercargill from about 1980.
[1] He began competing in Masters athletics events when he was 40 years old, going on to win 28 gold medals at world veteran track and field championships.
[1] Over his career, Turnbull set 25 Masters Athletics World Records across various age categories and events.
[3] His story was documented in the book The Fastest Old Man in the World by Vince Boyle, published in 2006,[4] and later made into a 30-minute film of the same name.