| Difficult Run to Brezovica | 4,435.71 mi (7,138.59 km) |
| Difficult Run to Cankova | 4,476.90 mi (7,204.87 km) |
| Difficult Run to Celje | 4,463.27 mi (7,182.94 km) |
| Difficult Run to Cerklje na Gorenjskem | 4,430.59 mi (7,130.34 km) |
| Difficult Run to Cerknica | 4,441.04 mi (7,147.17 km) |
| Difficult Run to Cerkno | 4,414.31 mi (7,104.14 km) |
| Difficult Run to Cerkvenjak | 4,479.27 mi (7,208.70 km) |
| Difficult Run to Cirkulane | 4,489.26 mi (7,224.77 km) |
| Difficult Run to Crensovci | 4,493.25 mi (7,231.20 km) |
| Difficult Run to Crna na Koroskem | 4,437.88 mi (7,142.07 km) |
| Difficult Run to Crnomelj | 4,483.49 mi (7,215.48 km) |
| Difficult Run to Destrnik | 4,479.32 mi (7,208.77 km) |
| Difficult Run to Divaca | 4,428.86 mi (7,127.56 km) |
| Difficult Run to Dobje | 4,471.98 mi (7,196.96 km) |
| Difficult Run to Dobrna | 4,458.11 mi (7,174.63 km) |
