[1] In this it differs from fell running; also its courses are more clearly marked and avoid dangerous sections.

For World Athletics purposes, mountain running takes place on terrain that is mainly off-road, but if there is significant elevation gain on the route, surfaced roads may be used.

The World Mountain Running Association runs an annual World Cup competition, which pulls together the best athletes in a series of the biggest and most prominent races in the sport.

The Valsir Mountain Running World Cup usually takes place between July and October predominantly in Continental Europe.

The series encompasses a variety of races in categories including; Classic (Up & Down), Vertical (Steep Uphill > 20%) and Long Distance Mountain Running with there usually being at least 3 races making up each category.