| Difficult Run to Creutzwald | 4,015.49 mi (6,462.30 km) |
| Difficult Run to Croissy-sur-Seine | 3,834.56 mi (6,171.13 km) |
| Difficult Run to Croix | 3,830.78 mi (6,165.04 km) |
| Difficult Run to Crosne | 3,852.23 mi (6,199.57 km) |
| Difficult Run to Cuers | 4,167.63 mi (6,707.15 km) |
| Difficult Run to Cugnaux | 3,945.06 mi (6,348.96 km) |
| Difficult Run to Cusset | 3,965.13 mi (6,381.27 km) |
| Difficult Run to Dammarie-le-Lys | 3,864.95 mi (6,220.04 km) |
| Difficult Run to Dammartin-en-Goele | 3,852.71 mi (6,200.33 km) |
| Difficult Run to Dardilly | 4,031.20 mi (6,487.59 km) |
| Difficult Run to Darnetal | 3,778.60 mi (6,081.07 km) |
| Difficult Run to Dax | 3,830.86 mi (6,165.17 km) |
| Difficult Run to Decines-Charpieu | 4,041.26 mi (6,503.78 km) |
| Difficult Run to Denain | 3,849.59 mi (6,195.32 km) |
| Difficult Run to Deuil-la-Barre | 3,839.82 mi (6,179.59 km) |
