| Boulder to Cassina de' Pecchi | 5,278.05 mi (8,494.20 km) |
| Boulder to Cassino | 5,632.97 mi (9,065.39 km) |
| Boulder to Castagneto Carducci | 5,435.71 mi (8,747.92 km) |
| Boulder to Castano Primo | 5,255.59 mi (8,458.05 km) |
| Boulder to Castel Bolognese | 5,420.82 mi (8,723.97 km) |
| Boulder to Castel Gandolfo | 5,578.92 mi (8,978.40 km) |
| Boulder to Castel Goffredo | 5,326.93 mi (8,572.87 km) |
| Boulder to Castel Maggiore | 5,393.53 mi (8,680.05 km) |
| Boulder to Castel Mella | 5,305.92 mi (8,539.05 km) |
| Boulder to Castel San Giorgio | 5,699.95 mi (9,173.18 km) |
| Boulder to Castel San Giovanni | 5,302.89 mi (8,534.18 km) |
| Boulder to Castel San Pietro Terme | 5,409.23 mi (8,705.32 km) |
| Boulder to Castel Volturno | 5,658.81 mi (9,106.97 km) |
| Boulder to Castelbuono | 5,824.67 mi (9,373.89 km) |
| Boulder to Casteldaccia | 5,797.94 mi (9,330.88 km) |
