If you know how many feet are in a mile (5280), it is easy to figure out how many yards are in a mile. Since there are 5280 feet in a mile, and 3 feet in a yard, all you would have to do is dived 5280 by 3. This calculates to be 1760 yards per mile.
A land mile or statute mile (1,852 meters or 6,076 feet) is equivalent to 1,760 yards. Measuring distance in miles is only confined in US, Canada and UK. Here is the link: http://www.ask.com/wiki/Yard#b.