After looking at the Google Maps images, the four biggest (Meadow Bridge, Moorefield, Tyler, and Tygarts) are all combination fields with a softball field and/or football field. Meadow Bridge and Tyler have moveable fences to act as the outfield fence, so it wouldn’t be nearly that far for a home run. It looks to be the same at the other two, but those fields were lined for football, so the fences were most likely put away for the season.