The event became increasingly international over its history, beginning with the admittance of the first non-UK country in 1907 (France), the addition of several other Continental European countries in the 1920s, and then the introduction of Tunisia in 1958 which saw an African team compete for the first time.

[1] The championships featured only a senior men's race from 1903 to 1961, at which point an under-21s event was introduced.

After some years as an unsanctioned competition, a women's race finally gained official acceptance in 1967.

[1] The event lasted from 1903 to 1972 – at the 1971 ICCU Congress members decided to transfer organisation of the event to the International Amateur Athletics Federation (IAAF), a move which was finalised after the 1972 ICC Championships and led to the first IAAF World Cross Country Championships in 1973.

[2] The International Cross Country Championships featured a number of running greats, including: Alfred Shrubb (the inaugural race winner) and Jean Bouin in its early years, Frank Sando who won twice, as well as Jack Holden and Alain Mimoun who both won the race a record four times, and then Franjo Mihalić, Gaston Roelants and David Bedford in its later years.