| Round Rock to Carpentras | 5,352.58 mi (8,614.15 km) |
| Round Rock to Carquefou | 4,968.65 mi (7,996.27 km) |
| Round Rock to Carqueiranne | 5,430.74 mi (8,739.92 km) |
| Round Rock to Carrieres-sous-Poissy | 5,063.13 mi (8,148.31 km) |
| Round Rock to Carrieres-sur-Seine | 5,074.38 mi (8,166.42 km) |
| Round Rock to Carros | 5,453.96 mi (8,777.30 km) |
| Round Rock to Carvin | 5,049.94 mi (8,127.10 km) |
| Round Rock to Castanet-Tolosan | 5,216.96 mi (8,395.88 km) |
| Round Rock to Castelginest | 5,208.21 mi (8,381.81 km) |
| Round Rock to Castelnau-le-Lez | 5,317.82 mi (8,558.21 km) |
| Round Rock to Castelnaudary | 5,243.58 mi (8,438.72 km) |
| Round Rock to Castelsarrasin | 5,182.57 mi (8,340.53 km) |
| Round Rock to Castres | 5,247.15 mi (8,444.47 km) |
| Round Rock to Caudebec-les-Elbeuf | 5,011.68 mi (8,065.52 km) |
| Round Rock to Caudry | 5,079.55 mi (8,174.74 km) |
