| Difficult Run to Caltagirone | 4,760.94 mi (7,661.98 km) |
| Difficult Run to Caltanissetta | 4,730.69 mi (7,613.31 km) |
| Difficult Run to Calvisano | 4,286.95 mi (6,899.18 km) |
| Difficult Run to Calvizzano | 4,608.90 mi (7,417.31 km) |
| Difficult Run to Camaiore | 4,331.85 mi (6,971.44 km) |
| Difficult Run to Cameri | 4,209.36 mi (6,774.31 km) |
| Difficult Run to Camisano Vicentino | 4,339.72 mi (6,984.11 km) |
| Difficult Run to Campagna | 4,658.04 mi (7,496.39 km) |
| Difficult Run to Campagnano di Roma | 4,485.01 mi (7,217.93 km) |
| Difficult Run to Campi Bisenzio | 4,372.01 mi (7,036.07 km) |
| Difficult Run to Campi Salentina | 4,796.06 mi (7,718.51 km) |
| Difficult Run to Campiglia Marittima | 4,374.93 mi (7,040.77 km) |
| Difficult Run to Campobasso | 4,605.69 mi (7,412.15 km) |
| Difficult Run to Campobello di Licata | 4,733.10 mi (7,617.19 km) |
| Difficult Run to Campobello di Mazara | 4,664.98 mi (7,507.57 km) |
