Spatial Coverage
- Mackinac Island (Mich. : Island)1
- Mackinac, Straits of (Mich.)1
- Mackinac, Straits of.1
- Manistique River (Mich.)1
- Manistique River.1
- Manitou Islands (Mich.)1
- Manitou Passage (Mich.)1
- Manitou Passage.1
- Marquette1
- Marquette Bay (Marquette County, Mich.)1
- Massachussetts1
- Matane (Québec)1
- Matapédia (Québec)1
- Maumee Bay (Ohio)1
- Maumee Bay.1
- Maumee River (Ind. and Ohio)1
- Mendocino National Forest (Calif.)1
- Mendocino National Forest.1
- Missouri.1
- Montana1
