There is no standardized form of cross country course and each venue is significantly defined by the environment it contains – some may be relatively flat and featureless, while others may be more challenging with natural obstacles, tight turns, and undulating ground. While a small number of purpose-built courses exist, the vast majority of cross country running courses are created by cordoning a specific area within any open natural land, typically a park, woodland or greenspace near a settlement.
At the elite and professional level, courses must be looped and each lap must be between 1750 m and 2000 m in length. Severe obstacles such as deep ditches, high barriers and thick undergrowth not normally present; the course should be able to be completed whilst remaining on foot throughout. In order to maintain the sport's distinction from road running, the usage of unnatural or macadamised surfaces is generally kept to a minimum or avoided entirely.
Due to the fact that the majority of races take place on areas of grass, soil, mud or earth, weather conditions can significantly affect the difficulty of cross country courses, as snow and rain reduces traction and can create areas of standing water.
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