What is the length of a football field? From goal line to goal line, the field is 100 yards long. Add 10 yards for each end zone.   In Canada, the field is 110 yards long from goal line to goal line, plus 20 yard…s for each end zone. 100 yards or 120 yards if you include the end zones, which is 300/360 feet, and 3600/4320 inches.