| Castricum to Castle Rock (Colorado) | 4,817.25 mi (7,752.62 km) |
| Castricum to Castro Valley (California) | 5,429.81 mi (8,738.43 km) |
| Castricum to Catalina Foothills (Arizona) | 5,410.77 mi (8,707.80 km) |
| Castricum to Cataño (Puerto Rico) | 4,411.76 mi (7,100.04 km) |
| Castricum to Cathedral City (California) | 5,498.19 mi (8,848.48 km) |
| Castricum to Catonsville (Maryland) | 3,804.00 mi (6,121.94 km) |
| Castricum to Cave Spring (Virginia) | 4,029.38 mi (6,484.65 km) |
| Castricum to Cayce (South Carolina) | 4,231.69 mi (6,810.24 km) |
| Castricum to Cayey (Puerto Rico) | 4,429.69 mi (7,128.90 km) |
| Castricum to Cedar City (Utah) | 5,172.47 mi (8,324.29 km) |
| Castricum to Cedar Falls (Iowa) | 4,231.97 mi (6,810.70 km) |
| Castricum to Cedar Hill (Texas) | 4,911.16 mi (7,903.75 km) |
| Castricum to Cedar Lake (Indiana) | 4,109.29 mi (6,613.26 km) |
| Castricum to Cedar Mill (Oregon) | 4,981.09 mi (8,016.30 km) |
| Castricum to Cedar Park (Texas) | 5,054.51 mi (8,134.45 km) |
