Magnor Lake, Polk County- Critical Habitat Designation
| 2001 |
Mallalieu Lake, St. Croix County - Critical Habitat Designation
| 2005 |
Mason Lake, Adams County - Critical Habitat Designation
| 2003 |
Mayflower Lake, Marathon County- Critical Habitat Designation
| 2003 |
McGinnis Lake, Adams County - Critical Habitat Designation
| 2004 |
Menomin Lake, Dunn County - Critical Habitat Area Designation
| 2007 |
Middle Eau Claire Lake, Bayfield County - Critical Habitat Designation
| 2007 |
Middle McKenzie Lake, Burnett and Washburn Counties- Critical Habitat Designation
| 1999 |
Minong Flowage and Nancy Lake, Washburn County - Critical Habitat Designation
| 2013 |
Mission Lake, Marathon County- Critical Habitat Designation
| 2004 |
Montgomery Lake - Kenosha County- Critical Habitat Designation
| 2004 |
Mud Hen Lake, Burnett County, Critical Habitat Designation
| 1998 |