| Blackrock to Cognac | 586.92 mi (944.56 km) |
| Blackrock to Cogolin | 904.75 mi (1,456.06 km) |
| Blackrock to Colmar | 691.85 mi (1,113.42 km) |
| Blackrock to Colombes | 474.02 mi (762.86 km) |
| Blackrock to Colomiers | 751.75 mi (1,209.82 km) |
| Blackrock to Combs-la-Ville | 496.22 mi (798.59 km) |
| Blackrock to Comines | 427.69 mi (688.30 km) |
| Blackrock to Compiegne | 471.60 mi (758.97 km) |
| Blackrock to Concarneau | 387.74 mi (624.00 km) |
| Blackrock to Conde-sur-l'Escaut | 460.43 mi (740.99 km) |
| Blackrock to Conflans-Sainte-Honorine | 465.35 mi (748.90 km) |
| Blackrock to Corbas | 723.32 mi (1,164.07 km) |
| Blackrock to Corbeil-Essonnes | 496.33 mi (798.76 km) |
| Blackrock to Cormeilles-en-Parisis | 469.97 mi (756.34 km) |
| Blackrock to Cosne sur Loire | 570.74 mi (918.52 km) |
