| Hard to Carlsbad (New Mexico) | 5,567.87 mi (8,960.62 km) |
| Hard to Carmel (Indiana) | 4,498.90 mi (7,240.27 km) |
| Hard to Carmichael (California) | 5,766.95 mi (9,281.01 km) |
| Hard to Carney (Maryland) | 4,134.52 mi (6,653.87 km) |
| Hard to Carnot-Moon (Pennsylvania) | 4,237.56 mi (6,819.69 km) |
| Hard to Carol Stream (Illinois) | 4,484.82 mi (7,217.62 km) |
| Hard to Carolina (Puerto Rico) | 4,626.17 mi (7,445.10 km) |
| Hard to Carolina Forest (South Carolina) | 4,487.67 mi (7,222.21 km) |
| Hard to Carpentersville (Illinois) | 4,481.33 mi (7,212.00 km) |
| Hard to Carpinteria (California) | 5,964.84 mi (9,599.49 km) |
| Hard to Carrboro (North Carolina) | 4,396.32 mi (7,075.19 km) |
| Hard to Carroll (Iowa) | 4,727.10 mi (7,607.54 km) |
| Hard to Carrollton (Georgia) | 4,756.75 mi (7,655.25 km) |
| Hard to Carrollton (Texas) | 5,260.83 mi (8,466.49 km) |
| Hard to Carrollwood (Florida) | 4,913.09 mi (7,906.85 km) |
