(Colorado, OH-36-19) S. of Greenfield, Madison Township, Highland County, OH. OH753 S. 4.0 miles from jct with OH28 (Jefferson St.) in Greenfield to the quilt on the W. side of the road at 10311. Paul & Evelyn Orr. (N39 17.727 W83 24.729) Photos by Jack & June Schmidt 7-16-15.