| River Grove to Manerbio | 4,576.44 mi (7,365.06 km) |
| River Grove to Manfredonia | 4,963.66 mi (7,988.24 km) |
| River Grove to Maniago | 4,642.76 mi (7,471.80 km) |
| River Grove to Mantova | 4,610.78 mi (7,420.34 km) |
| River Grove to Maranello | 4,639.61 mi (7,466.73 km) |
| River Grove to Marano di Napoli | 4,927.51 mi (7,930.06 km) |
| River Grove to Marano Vicentino | 4,613.16 mi (7,424.16 km) |
| River Grove to Marcianise | 4,926.29 mi (7,928.10 km) |
| River Grove to Marcon | 4,652.57 mi (7,487.59 km) |
| River Grove to Mareno di Piave | 4,642.55 mi (7,471.46 km) |
| River Grove to Margherita di Savoia | 4,984.81 mi (8,022.28 km) |
| River Grove to Mariano Comense | 4,525.71 mi (7,283.43 km) |
| River Grove to Marigliano | 4,936.72 mi (7,944.89 km) |
| River Grove to Marino | 4,828.70 mi (7,771.04 km) |
| River Grove to Marostica | 4,619.81 mi (7,434.87 km) |
