| Difficult Run to Campo de Criptana | 3,855.65 mi (6,205.07 km) |
| Difficult Run to Campos del Puerto | 4,148.11 mi (6,675.73 km) |
| Difficult Run to Canals | 3,990.94 mi (6,422.80 km) |
| Difficult Run to Candelaria | 3,517.63 mi (5,661.07 km) |
| Difficult Run to Canet de Mar | 4,059.88 mi (6,533.74 km) |
| Difficult Run to Cangas | 3,505.90 mi (5,642.20 km) |
| Difficult Run to Cangas de Narcea | 3,589.97 mi (5,777.51 km) |
| Difficult Run to Canovellas | 4,045.11 mi (6,509.97 km) |
| Difficult Run to Canteras | 4,010.59 mi (6,454.41 km) |
| Difficult Run to Cantillana | 3,776.31 mi (6,077.38 km) |
| Difficult Run to Capdepera | 4,158.98 mi (6,693.23 km) |
| Difficult Run to Carballo | 3,487.72 mi (5,612.94 km) |
| Difficult Run to Carcagente | 3,992.53 mi (6,425.36 km) |
| Difficult Run to Cardedeu | 4,048.02 mi (6,514.66 km) |
| Difficult Run to Carlet | 3,985.87 mi (6,414.65 km) |
