| Hard to Caño Martin Peña (Puerto Rico) | 4,628.27 mi (7,448.48 km) |
| Hard to Cañon City (Colorado) | 5,277.71 mi (8,493.65 km) |
| Hard to Canóvanas (Puerto Rico) | 4,624.27 mi (7,442.05 km) |
| Hard to Canton (Georgia) | 4,700.40 mi (7,564.56 km) |
| Hard to Canton (Illinois) | 4,621.24 mi (7,437.17 km) |
| Hard to Canton (Mississippi) | 5,008.06 mi (8,059.69 km) |
| Hard to Canton (Ohio) | 4,271.07 mi (6,873.63 km) |
| Hard to Canyon (Texas) | 5,344.96 mi (8,601.88 km) |
| Hard to Canyon Lake (California) | 5,937.55 mi (9,555.56 km) |
| Hard to Canyon Lake (Texas) | 5,475.31 mi (8,811.66 km) |
| Hard to Cape Coral (Florida) | 4,958.93 mi (7,980.62 km) |
| Hard to Cape Girardeau (Missouri) | 4,758.70 mi (7,658.38 km) |
| Hard to Carbondale (Illinois) | 4,725.69 mi (7,605.26 km) |
| Hard to Carlisle (Pennsylvania) | 4,128.34 mi (6,643.93 km) |
| Hard to Carlsbad (California) | 5,970.97 mi (9,609.36 km) |
