| River Ridge to McHenry (Illinois) | 862.00 mi (1,387.25 km) |
| River Ridge to McKeesport (Pennsylvania) | 924.97 mi (1,488.59 km) |
| River Ridge to McKinleyville (California) | 2,035.91 mi (3,276.49 km) |
| River Ridge to McKinney (Texas) | 440.52 mi (708.94 km) |
| River Ridge to McLean (Virginia) | 965.73 mi (1,554.19 km) |
| River Ridge to McMinnville (Oregon) | 2,069.24 mi (3,330.12 km) |
| River Ridge to McMinnville (Tennessee) | 472.10 mi (759.77 km) |
| River Ridge to McNair (Virginia) | 956.64 mi (1,539.57 km) |
| River Ridge to McPherson (Kansas) | 719.64 mi (1,158.16 km) |
| River Ridge to Mead Valley (California) | 1,605.28 mi (2,583.45 km) |
| River Ridge to Meadow Woods (Florida) | 546.36 mi (879.29 km) |
| River Ridge to Meadowbrook (Virginia) | 894.92 mi (1,440.23 km) |
| River Ridge to Meadville (Pennsylvania) | 983.72 mi (1,583.15 km) |
| River Ridge to Mebane (North Carolina) | 761.62 mi (1,225.71 km) |
| River Ridge to Mechanicsville (Virginia) | 907.53 mi (1,460.54 km) |
