What: 3rd Annual Mercer County Corn Maze Sponsored by the Coldwater Knights of Columbus When: September 7-8 & September 14-15 from Noon until 7:00 p.m. -- weather permitting Where: 3864 State Route 219, Coldwater, OH 45828 To date we’ve been able to donate nearly $9,000 to the Cancer Association of Mercer ...