From 1964 to 1967 the championship was named Challenge Henry Groutars.
Up until 2010, the outdoor world trial championship has been won by 6 different pilots from the UK, 5 from Spain, 2 from Finland and France, and 1 from Belgium, Germany, United States, Japan and Sweden.
Since 2005, only Spanish pilots have won the outdoor and the indoor world trial championships.
"Note: Green background denotes Challenge Henry Groutars" "Note: Pink background denotes European Championship."
[1] As of October 2024, the following ranking shows the riders with most world titles, in outdoor, indoor and total: As of November 2023, the following ranking shows the countries with most world titles, in outdoor, indoor and total: