| River Grove to Montijo | 4,108.79 mi (6,612.45 km) |
| River Grove to Montilla | 4,248.70 mi (6,837.61 km) |
| River Grove to Montmelo | 4,404.42 mi (7,088.23 km) |
| River Grove to Montornes del Valles | 4,405.55 mi (7,090.04 km) |
| River Grove to Montoro | 4,243.99 mi (6,830.04 km) |
| River Grove to Monzon | 4,302.23 mi (6,923.77 km) |
| River Grove to Mora | 4,209.78 mi (6,774.99 km) |
| River Grove to Moralzarzal | 4,165.00 mi (6,702.92 km) |
| River Grove to Moron de la Frontera | 4,228.11 mi (6,804.49 km) |
| River Grove to Mostoles | 4,182.00 mi (6,730.28 km) |
| River Grove to Motril | 4,331.66 mi (6,971.13 km) |
| River Grove to Muchamiel | 4,407.44 mi (7,093.09 km) |
| River Grove to Mula | 4,374.71 mi (7,040.42 km) |
| River Grove to Munguia | 4,118.43 mi (6,627.98 km) |
| River Grove to Murcia | 4,393.15 mi (7,070.09 km) |
