| Upper Grand Lagoon to Mattoon (Illinois) | 660.02 mi (1,062.20 km) |
| Upper Grand Lagoon to Mauldin (South Carolina) | 376.41 mi (605.78 km) |
| Upper Grand Lagoon to Maumee (Ohio) | 796.17 mi (1,281.31 km) |
| Upper Grand Lagoon to Maumelle (Arkansas) | 504.99 mi (812.71 km) |
| Upper Grand Lagoon to Mayagüez (Puerto Rico) | 1,431.18 mi (2,303.27 km) |
| Upper Grand Lagoon to Mayfield Heights (Ohio) | 819.74 mi (1,319.25 km) |
| Upper Grand Lagoon to Mays Chapel (Maryland) | 821.05 mi (1,321.36 km) |
| Upper Grand Lagoon to Maywood (California) | 1,909.81 mi (3,073.54 km) |
| Upper Grand Lagoon to Maywood (Illinois) | 817.55 mi (1,315.73 km) |
| Upper Grand Lagoon to McAlester (Oklahoma) | 669.90 mi (1,078.09 km) |
| Upper Grand Lagoon to McAllen (Texas) | 808.24 mi (1,300.73 km) |
| Upper Grand Lagoon to McCalla (Alabama) | 229.36 mi (369.12 km) |
| Upper Grand Lagoon to McComb (Mississippi) | 290.67 mi (467.79 km) |
| Upper Grand Lagoon to McDonough (Georgia) | 244.50 mi (393.49 km) |
| Upper Grand Lagoon to McFarland (California) | 1,969.98 mi (3,170.37 km) |
