The 2021 UCI Mountain Bike Marathon World Championships took place in Elba, Italy on 2 October 2021.^[1] It was the 19th edition of the UCI Mountain Bike Marathon World Championships.

Medal summary

Event	Gold		Silver		Bronze
Men details	Andreas Seewald  Germany	6:02.03	Diego Arias  Colombia	6:04.27	José Dias  Portugal	6:07.34
Women details	Mona Mitterwallner  Austria	4:48.54	Maja Włoszczowska  Poland	4:50.07	Natalia Fischer  Spain	4:56.31