| Castro Valley to Montevarchi | 6,117.62 mi (9,845.35 km) |
| Castro Valley to Monticello Conte Otto | 6,000.70 mi (9,657.19 km) |
| Castro Valley to Montichiari | 5,977.65 mi (9,620.09 km) |
| Castro Valley to Montignoso | 6,049.56 mi (9,735.82 km) |
| Castro Valley to Montopoli in Val d'Arno | 6,086.16 mi (9,794.72 km) |
| Castro Valley to Monza | 5,936.35 mi (9,553.63 km) |
| Castro Valley to Morbegno | 5,914.18 mi (9,517.96 km) |
| Castro Valley to Mori | 5,969.90 mi (9,607.63 km) |
| Castro Valley to Morlupo | 6,223.27 mi (10,015.39 km) |
| Castro Valley to Morrovalle | 6,186.59 mi (9,956.36 km) |
| Castro Valley to Mortara | 5,939.64 mi (9,558.93 km) |
| Castro Valley to Mosciano Sant'Angelo | 6,227.61 mi (10,022.37 km) |
| Castro Valley to Motta di Livenza | 6,018.61 mi (9,686.01 km) |
| Castro Valley to Motta Sant'Anastasia | 6,562.85 mi (10,561.89 km) |
| Castro Valley to Mottola | 6,438.06 mi (10,361.05 km) |
