| Boulder to Cavaillon | 5,202.19 mi (8,372.11 km) |
| Boulder to Cebazat | 5,039.94 mi (8,111.00 km) |
| Boulder to Cenon | 4,946.91 mi (7,961.29 km) |
| Boulder to Cergy | 4,860.96 mi (7,822.96 km) |
| Boulder to Cernay | 5,093.89 mi (8,197.82 km) |
| Boulder to Cesson | 4,900.49 mi (7,886.58 km) |
| Boulder to Cesson-Sevigne | 4,768.11 mi (7,673.53 km) |
| Boulder to Cestas | 4,946.05 mi (7,959.89 km) |
| Boulder to Chalette-sur-Loing | 4,929.69 mi (7,933.56 km) |
| Boulder to Challans | 4,811.21 mi (7,742.90 km) |
| Boulder to Chalon-sur-Saone | 5,060.21 mi (8,143.62 km) |
| Boulder to Chalons-en-Champagne | 4,944.61 mi (7,957.58 km) |
| Boulder to Chamalieres | 5,041.32 mi (8,113.23 km) |
| Boulder to Chambery | 5,153.71 mi (8,294.10 km) |
| Boulder to Chambly | 4,861.76 mi (7,824.25 km) |
