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The track surface of a horse racing track refers to the material of which the track is made .. horse racing. horse racing. There are three types of track surfaces used in modern horse racing .. horse racing. horse racing. These are  :. Turf , the most common track surface in Europe. Turf. Grass#Sports turf. Dirt , the most common track surface in the US. Artificial or Synthetic , the collective term for a number of proprietary man-made surfaces in use at a number of locations around the world .. The style of racing differs between surfaces , with dirt races tending to have the fastest pace , while turf racing often comes down to a sprint in the stretch .. Races on artificial surfaces tend to play out somewhere in between .. Anecdotally , American bettors consider dirt racing to be more predictable , which makes it a more popular medium for betting purposes .. betting. betting. Weather conditions affect the speed of the different surfaces too , and grading systems have been developed to indicate the track condition -LRB- known as the `` going '' in the UK and Ireland -RRB- .. track condition. track condition. Ireland. Ireland. Turf surfaces are the most affected by changes in the weather , and many turf horses will have a strong preference for a specific type of going .. Turf. Grass#Sports turf