| Difficult Run to Cavaillon | 4,102.79 mi (6,602.79 km) |
| Difficult Run to Cebazat | 3,958.11 mi (6,369.97 km) |
| Difficult Run to Cenon | 3,823.29 mi (6,152.99 km) |
| Difficult Run to Cergy | 3,827.18 mi (6,159.25 km) |
| Difficult Run to Cernay | 4,075.98 mi (6,559.65 km) |
| Difficult Run to Cesson | 3,862.04 mi (6,215.35 km) |
| Difficult Run to Cesson-Sevigne | 3,693.13 mi (5,943.51 km) |
| Difficult Run to Cestas | 3,819.54 mi (6,146.95 km) |
| Difficult Run to Chalette-sur-Loing | 3,882.40 mi (6,248.11 km) |
| Difficult Run to Challans | 3,711.95 mi (5,973.80 km) |
| Difficult Run to Chalon-sur-Saone | 4,007.21 mi (6,448.98 km) |
| Difficult Run to Chalons-en-Champagne | 3,925.75 mi (6,317.88 km) |
| Difficult Run to Chamalieres | 3,958.30 mi (6,370.26 km) |
| Difficult Run to Chambery | 4,088.69 mi (6,580.12 km) |
| Difficult Run to Chambly | 3,831.62 mi (6,166.40 km) |
