| River Grove to Mattoon (Illinois) | 171.28 mi (275.65 km) |
| River Grove to Mauldin (South Carolina) | 577.14 mi (928.82 km) |
| River Grove to Maumee (Ohio) | 216.55 mi (348.51 km) |
| River Grove to Maumelle (Arkansas) | 547.33 mi (880.84 km) |
| River Grove to Mayagüez (Puerto Rico) | 2,042.13 mi (3,286.48 km) |
| River Grove to Mayfield Heights (Ohio) | 330.38 mi (531.69 km) |
| River Grove to Mays Chapel (Maryland) | 610.35 mi (982.26 km) |
| River Grove to Maywood (California) | 1,731.33 mi (2,786.31 km) |
| River Grove to Maywood (Illinois) | 3.09 mi (4.98 km) |
| River Grove to McAlester (Oklahoma) | 646.19 mi (1,039.94 km) |
| River Grove to McAllen (Texas) | 1,235.25 mi (1,987.94 km) |
| River Grove to McCalla (Alabama) | 597.35 mi (961.34 km) |
| River Grove to McComb (Mississippi) | 752.14 mi (1,210.45 km) |
| River Grove to McDonough (Georgia) | 619.76 mi (997.41 km) |
| River Grove to McFarland (California) | 1,734.57 mi (2,791.51 km) |
