4c8765c2__School_Football___For_Dummies_High_School_Rules_to_NFL_Rules_High_School_Rule
[NFL Rule] Hash marks are 70’ 9 from each sideline. [High School Rule] 
The hash marks are 53’4 from each sideline. Because the hash marks are close to each sideline, high school offenses can attempt more running plays to the wide side of the field.
The Rules of High School Football - For Dummies