His father, Arvo Leok, was a motocross rider and introduced his son to the sport at a young age.

He lived in Estonia and attended Sõmerpalu Primary school until he was 16 years old when he decided to pursue his racing career full-time.

He made a huge impact during this season, being the only remaining top level rider on a two-stroke machine in the class.

His reputation was solidified with a number of furious on-track battles with the hotshots of the class, such as multiple world champion Stefan Everts.

At the end of the 2004 season he signed a two-year contract with the Kawasaki factory team of legendary champion maker Jan De Groot.

Leok claimed his first podium in FIM Motocross World Championships MX1 class on 2 April 2006 at Zolder, Belgium.

[3] After having claimed numerous GP podiums in the preceding year, Tanel Leok won his first MX1 Grand Prix in Ireland in 31, August 2008.

[6] He won the first GP of the season in Faenza, Italy, and was the first holder of the red plate marking him as world championship leader.

The Estonian Express, Tanel Leok, has signed an agreement with the British-based LPE Kawasaki Team for next year.

After a long time in the Grand Prix's, Leok will focus himself on the British MX1 Championship and the MX Nationals in Great Britain.

[22] Tanel Leok has the world record of the most Motocross of Nations performances, he has 19 straight years and 19 times in the final.

[24] Estonian professional motocross racer Tanel Leok announced on 3 November 2020 that, the Kegums round in Latvia next year will be the last of his 20-year career.