Place
- Brandon1
- Bryant's Bog1
- Burt Lake, at the old sawmill1
- California1
- Cambria1
- Campobello1
- Cape Breton Island, Cape Breton Highlands National Park, Mary Ann Falls1
- Cape Breton Island, Valley of Barrasois1
- Cape Breton Island, Valley of Barrasois River1
- Carrying Place Twp., along Appalachian Trail between mouth of Pierce Pond stream and Pierce Pond Stream Falls, along Otter Pond Stream1
- Carter1
- Carter Cave Region1
- Cecil Bay1
- Cedar Creek Bog1
- Cedar Lake1
- Charlton1
- Clark1
- Clingman's Dome1
- Contact UM Herbarium1
- Cook1