| Boulder to Casamassima | 5,767.85 mi (9,282.46 km) |
| Boulder to Casandrino | 5,676.48 mi (9,135.42 km) |
| Boulder to Casapulla | 5,670.83 mi (9,126.32 km) |
| Boulder to Casarano | 5,859.52 mi (9,429.98 km) |
| Boulder to Casatenovo | 5,267.39 mi (8,477.05 km) |
| Boulder to Casciana Terme | 5,418.63 mi (8,720.44 km) |
| Boulder to Cascina | 5,408.57 mi (8,704.26 km) |
| Boulder to Caselle Torinese | 5,233.94 mi (8,423.22 km) |
| Boulder to Caserta | 5,672.58 mi (9,129.14 km) |
| Boulder to Casier | 5,371.61 mi (8,644.77 km) |
| Boulder to Casorate Primo | 5,275.50 mi (8,490.10 km) |
| Boulder to Casoria | 5,679.94 mi (9,140.98 km) |
| Boulder to Cassano al Ionio | 5,808.15 mi (9,347.32 km) |
| Boulder to Cassano d'Adda | 5,282.45 mi (8,501.28 km) |
| Boulder to Cassano delle Murge | 5,766.23 mi (9,279.84 km) |
