Place
- Mansfield1
- Maple Ridge Twp., at Maple Ridge County Park at the west end of Lacomb Rd. ca. 8 mi. NW of Alpena, edge of Thunder Bay River1
- Maple River - west of Pellston1
- Marinette1
- Marion Springs State Game Area1
- Marsh at outlet of Van Hellon Creek into Canada Creek1
- Matane1
- Meghalaya1
- Metamora1
- Milburn1
- Mill Yard, Cecil Bay1
- Millers1
- Missaukee1
- Missoula1
- Moel Ch'en near Tenejapa Center1
- Moist ditch between Marinette & Pestigo1
- Monmouth1
- Monroe Piers1
- Montauk Point, Long Island1
- Monterey1