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A Keyhole race is a speed event commonly seen at equestrian events and gymkhanas, in which the horse and rider team with the fastest time in completing the event wins. Horses running this event must have speed, but also the agility to stop quickly in full stride, turn, and bolt directly back into a run. ==Course== The obstacle course is a pattern, usually marked with white powder (commonly flour or powdered chalk) poured into a "keyhole" shape in the dirt. The pattern varies between events. According to the California Gymkhana Association, the pattern should be set up as follows: *80 feet from arena gate to timing line. *100 feet from timing line to center of keyhole. *Keyhole should be four feet across at the entrance, 10 feet from the entrance of the key hole to the bulb. *The bulb itself should be 20 feet across. *The pattern may also be made of cones or poles set up in a similar pattern. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「keyhole race」の詳細全文を読む スポンサード リンク
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