| Upper Grand Lagoon to McHenry (Illinois) | 852.67 mi (1,372.24 km) |
| Upper Grand Lagoon to McKeesport (Pennsylvania) | 777.15 mi (1,250.70 km) |
| Upper Grand Lagoon to McKinleyville (California) | 2,259.45 mi (3,636.24 km) |
| Upper Grand Lagoon to McKinney (Texas) | 675.31 mi (1,086.80 km) |
| Upper Grand Lagoon to McLean (Virginia) | 776.40 mi (1,249.50 km) |
| Upper Grand Lagoon to McMinnville (Oregon) | 2,269.01 mi (3,651.63 km) |
| Upper Grand Lagoon to McMinnville (Tennessee) | 381.22 mi (613.52 km) |
| Upper Grand Lagoon to McNair (Virginia) | 769.17 mi (1,237.86 km) |
| Upper Grand Lagoon to McPherson (Kansas) | 884.29 mi (1,423.13 km) |
| Upper Grand Lagoon to Mead Valley (California) | 1,858.25 mi (2,990.57 km) |
| Upper Grand Lagoon to Meadow Woods (Florida) | 292.53 mi (470.78 km) |
| Upper Grand Lagoon to Meadowbrook (Virginia) | 690.04 mi (1,110.51 km) |
| Upper Grand Lagoon to Meadville (Pennsylvania) | 852.13 mi (1,371.37 km) |
| Upper Grand Lagoon to Mebane (North Carolina) | 553.89 mi (891.40 km) |
| Upper Grand Lagoon to Mechanicsville (Virginia) | 704.14 mi (1,133.20 km) |
