The race was held on off-road trails that covered steep terrain, travelling from sea level to an altitude of 250m.
Kettlewell has been a competitive athlete for most of his life and in 1985 won the New Zealand marathon title age 40-45 in a personal best time of 2hr 29min
The following year he travelled to Australia and won the 1986 Australasian title.
The world championships are held annually in Hawaii and Kettlewell is hopeful of returning in December this year to defend his title.
Meanwhile, he will compete for the Harriers and continue taking delight in beating runners many years his junior.