1. There is no precise definition in the Rules of Golf for fairway. It is deemed to be an area between the tee and putting green included in the term "through the green." In terms of maintenance, fairways are those areas of the course which are mowed at heights between 0.5 and 1.25 inches, depending upon grass species and cultural intensity desired. Fairways normally measure approximately 50 yards in width, but vary from about 33 yards to more than 60 yards depending on the caliber of golf course involved and limitations imposed by architecture or terrain.
Source: Ohio State University Turfgrass Program