| South River to Maryland Heights (Missouri) | 864.19 mi (1,390.77 km) |
| South River to Marysville (California) | 2,477.18 mi (3,986.63 km) |
| South River to Marysville (Ohio) | 473.04 mi (761.29 km) |
| South River to Marysville (Washington) | 2,381.99 mi (3,833.44 km) |
| South River to Maryville (Missouri) | 1,075.91 mi (1,731.51 km) |
| South River to Maryville (Tennessee) | 614.19 mi (988.45 km) |
| South River to Mason (Ohio) | 531.08 mi (854.69 km) |
| South River to Mason City (Iowa) | 985.10 mi (1,585.37 km) |
| South River to Massapequa (New York) | 50.06 mi (80.56 km) |
| South River to Massapequa Park (New York) | 51.41 mi (82.73 km) |
| South River to Massillon (Ohio) | 375.48 mi (604.28 km) |
| South River to Mastic (New York) | 84.10 mi (135.35 km) |
| South River to Mastic Beach (New York) | 83.84 mi (134.93 km) |
| South River to Matteson (Illinois) | 700.50 mi (1,127.34 km) |
| South River to Matthews (North Carolina) | 504.66 mi (812.17 km) |
