| Castricum to Carson (California) | 5,551.95 mi (8,935.00 km) |
| Castricum to Carson City (Nevada) | 5,280.42 mi (8,498.01 km) |
| Castricum to Carteret (New Jersey) | 3,644.02 mi (5,864.49 km) |
| Castricum to Cartersville (Georgia) | 4,368.39 mi (7,030.24 km) |
| Castricum to Carthage (Missouri) | 4,573.28 mi (7,359.99 km) |
| Castricum to Cary (Illinois) | 4,097.48 mi (6,594.26 km) |
| Castricum to Cary (North Carolina) | 4,052.87 mi (6,522.47 km) |
| Castricum to Casa de Oro-Mount Helix (California) | 5,576.51 mi (8,974.52 km) |
| Castricum to Casa Grande (Arizona) | 5,404.79 mi (8,698.17 km) |
| Castricum to Casas Adobes (Arizona) | 5,412.78 mi (8,711.03 km) |
| Castricum to Cascades (Virginia) | 3,839.56 mi (6,179.17 km) |
| Castricum to Casper (Wyoming) | 4,674.71 mi (7,523.22 km) |
| Castricum to Casselberry (Florida) | 4,510.73 mi (7,259.31 km) |
| Castricum to Castaic (California) | 5,524.94 mi (8,891.53 km) |
| Castricum to Castle Pines (Colorado) | 4,813.10 mi (7,745.93 km) |
