Early in his career, when there was still a split between professional and amateur fell racing, Stuart competed in professional races, converting to amateur status in 1982. His first full amateur season in 1983 was marked by close competition with John Wild who had won the previous year's championship. Stuart won the last 1983 championship race at Thieveley Pike, thereby becoming British champion.
Stuart was also British champion in 1984 and 1985 and among the records he set in those years were 1:02:18 at Skiddaw, 1:25:34 at Ben Nevis, 1:02:29 at Snowdon, and 3:20:57 at the Ennerdale Horseshoe, which still stand as of 2016. In 1985 he won the short race at the inaugural World Mountain Running Cup in Italy.
In 1986, Stuart turned his attention to road running and won his debut marathon that year at Glasgow in 2:14:03. He went on to set his best marathon time of 2:11:36 at Houston in 1989 but his career was curtailed by increasing allergy and virus problems.
His life story is told in Steve Chilton's 'Running Hard: the story of a rivalry' (Dingwall, 2017).
- Steve Chilton, Running Hard (Dingwall, 2017).
- Richard Askwith, Feet in the Clouds (London, 2004), 114-20.
- Steve Chilton, It's a Hill, Get Over It (Dingwall, 2013), 329.
- The Fell Runner, Jan 1985, 28.
- The Fell Runner, Jan 1985, 56.
- The Fell Runner, Jan 1986, 92.
- CFRA: Ennerdale 'Horseshoe' Fell Race.
- Richard Askwith, Feet in the Clouds (London, 2004), 124.
- Richard Askwith, Feet in the Clouds (London, 2004), 125-30.
- Kenny Stuart – King of the Mountains
- iaion333 on YouTube: Kenny Stuart winning the 1980 Kilnsey Crag Race
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