| Round Rock to Castelletto sopra Ticino | 5,442.03 mi (8,758.10 km) |
| Round Rock to Castelli Calepio | 5,496.47 mi (8,845.72 km) |
| Round Rock to Castelnovo ne' Monti | 5,562.71 mi (8,952.32 km) |
| Round Rock to Castelnuovo Berardenga | 5,650.42 mi (9,093.47 km) |
| Round Rock to Castelnuovo di Porto | 5,739.97 mi (9,237.59 km) |
| Round Rock to Castelnuovo di Verona | 5,539.04 mi (8,914.23 km) |
| Round Rock to Castelnuovo Rangone | 5,579.98 mi (8,980.12 km) |
| Round Rock to Castelvetrano | 5,932.16 mi (9,546.89 km) |
| Round Rock to Castelvetro di Modena | 5,582.61 mi (8,984.34 km) |
| Round Rock to Castenaso | 5,603.40 mi (9,017.80 km) |
| Round Rock to Castenedolo | 5,518.69 mi (8,881.47 km) |
| Round Rock to Castiglion Fiorentino | 5,667.65 mi (9,121.20 km) |
| Round Rock to Castiglione del Lago | 5,681.10 mi (9,142.85 km) |
| Round Rock to Castiglione delle Stiviere | 5,529.59 mi (8,899.01 km) |
| Round Rock to Castrolibero | 6,011.56 mi (9,674.68 km) |
