High school hash marks are 53'4" from the sidelines while NCAA hash marks are 60' from sidelines. High School Football Field Differences The National Federation of State High School Associations states that: High school goal posts are 23'4" wide and 20' tall from ground while NCAA goal posts are 18'6" wide and 30' tall poles from ground. Width: 160 feet or 53 1/3 yards. There should be padding on the goal post from the ground up to 6 feet from the ground. In American football the standard field dimensions are 120 yards long and 53 1/3 yards wide. Field Numbers: You'll also see a \"G\" on high school fields where the goal line is located. The width of the goal posts are 23 feet, 4 inches for high school as compared to 18 feet, 6 inches for college and pro ranks. High School Overall football field dimensions are as follows: Length: 360 feet or 120 yards. End Line: A six foot end line border marks the back of the end zone. The number one difference between high school and college/pro football fields is the goal post. All goal post are 10 feet from the ground. End Zone: High School end zones are 10 yards deep.