| Middle River to Marrero (Louisiana) | 1,014.09 mi (1,632.02 km) |
| Middle River to Marshall (Minnesota) | 1,053.47 mi (1,695.39 km) |
| Middle River to Marshall (Missouri) | 896.71 mi (1,443.11 km) |
| Middle River to Marshall (Texas) | 1,104.93 mi (1,778.21 km) |
| Middle River to Marshalltown (Iowa) | 881.77 mi (1,419.07 km) |
| Middle River to Marshfield (Wisconsin) | 794.35 mi (1,278.38 km) |
| Middle River to Martha Lake (Washington) | 2,329.65 mi (3,749.21 km) |
| Middle River to Martin (Tennessee) | 708.40 mi (1,140.07 km) |
| Middle River to Martinez (California) | 2,439.93 mi (3,926.69 km) |
| Middle River to Martinez (Georgia) | 510.94 mi (822.28 km) |
| Middle River to Martinsburg (West Virginia) | 83.25 mi (133.98 km) |
| Middle River to Martinsville (Indiana) | 534.15 mi (859.63 km) |
| Middle River to Martinsville (New Jersey) | 131.03 mi (210.87 km) |
| Middle River to Martinsville (Virginia) | 262.32 mi (422.17 km) |
| Middle River to Maryland City (Maryland) | 26.32 mi (42.36 km) |
