In high school we sometimes played at a course called Lords Valley, near Hawley, PA, designed by Norman Woods and opened in 1963.
The 7th green at the time was the biggest thing I'd ever seen in my life, and in my memory, that green just HAD to be 100 yards long!
Today, I went back to Lords Valley via Google Earth and found the 7th green...it was big alright, but only about 46 or so yards from front to back.
Must be the changing mowing patterns...