| Castro Valley to Melzo | 5,945.11 mi (9,567.73 km) |
| Castro Valley to Mendicino | 6,495.48 mi (10,453.47 km) |
| Castro Valley to Menfi | 6,496.34 mi (10,454.85 km) |
| Castro Valley to Mentana | 6,234.71 mi (10,033.80 km) |
| Castro Valley to Merano | 5,928.59 mi (9,541.14 km) |
| Castro Valley to Merate | 5,934.47 mi (9,550.61 km) |
| Castro Valley to Mercato San Severino | 6,366.32 mi (10,245.60 km) |
| Castro Valley to Mercogliano | 6,357.52 mi (10,231.44 km) |
| Castro Valley to Mesagne | 6,462.71 mi (10,400.73 km) |
| Castro Valley to Messina | 6,539.71 mi (10,524.65 km) |
| Castro Valley to Mestre | 6,024.97 mi (9,696.26 km) |
| Castro Valley to Mestrino | 6,014.28 mi (9,679.05 km) |
| Castro Valley to Milan | 5,940.41 mi (9,560.17 km) |
| Castro Valley to Milazzo | 6,529.11 mi (10,507.58 km) |
| Castro Valley to Minerbio | 6,053.18 mi (9,741.65 km) |
