Tiomila or 10-mila is an orienteering race held annually in Sweden since 1945, usually in late April or early May.

It is a 10-man relay which includes both night and daytime legs.

Tiomila attracts club teams from all the major orienteering nations.

[1] The name means "ten mil" (100 km) and refers to the total distance run by each team.

The 2015 edition was measured to 116 kilometres (72 mi) along the straight line between the controls.