| River Grove to Mechernich | 4,239.37 mi (6,822.61 km) |
| River Grove to Meckenbeuren | 4,460.13 mi (7,177.89 km) |
| River Grove to Meckenheim | 4,251.71 mi (6,842.47 km) |
| River Grove to Meerane | 4,440.50 mi (7,146.29 km) |
| River Grove to Meerbusch | 4,215.47 mi (6,784.14 km) |
| River Grove to Meine | 4,312.15 mi (6,939.74 km) |
| River Grove to Meinerzhagen | 4,256.38 mi (6,849.98 km) |
| River Grove to Meiningen | 4,379.20 mi (7,047.65 km) |
| River Grove to Meissen | 4,463.66 mi (7,183.56 km) |
| River Grove to Meitingen | 4,474.57 mi (7,201.12 km) |
| River Grove to Melle | 4,241.34 mi (6,825.78 km) |
| River Grove to Melsungen | 4,325.28 mi (6,960.87 km) |
| River Grove to Memmelsdorf | 4,423.03 mi (7,118.17 km) |
| River Grove to Memmingen | 4,472.04 mi (7,197.06 km) |
| River Grove to Mendig | 4,271.14 mi (6,873.73 km) |
