In the women's competition, another Russian woman, Maria Istomina, finished second.
The third place was taken by the Czech Sandra Shuezova.
In the men's race, Russian skiers took the entire podium.
Bolshunov was joined by the runner-up Alexei Chervotkin and the third-best Alexander Terentyev.
Earlier, the coach of the Russian national skiing team spoke about the vaccination of athletes against coronavirus