| Boulder to Miami Lakes (Florida) | 1,733.61 mi (2,789.97 km) |
| Boulder to Miami Shores (Florida) | 1,742.44 mi (2,804.18 km) |
| Boulder to Miami Springs (Florida) | 1,739.29 mi (2,799.12 km) |
| Boulder to Miamisburg (Ohio) | 1,110.98 mi (1,787.95 km) |
| Boulder to Michigan City (Indiana) | 965.69 mi (1,554.13 km) |
| Boulder to Middle Island (New York) | 1,689.87 mi (2,719.58 km) |
| Boulder to Middle River (Maryland) | 1,526.82 mi (2,457.19 km) |
| Boulder to Middle Valley (Tennessee) | 1,144.70 mi (1,842.22 km) |
| Boulder to Middleburg (Florida) | 1,483.61 mi (2,387.64 km) |
| Boulder to Middleburg Heights (Ohio) | 1,227.51 mi (1,975.48 km) |
| Boulder to Middlesex (New Jersey) | 1,612.62 mi (2,595.27 km) |
| Boulder to Middleton (Wisconsin) | 839.99 mi (1,351.84 km) |
| Boulder to Middletown (Connecticut) | 1,698.43 mi (2,733.36 km) |
| Boulder to Middletown (Delaware) | 1,562.54 mi (2,514.67 km) |
| Boulder to Middletown (New York) | 1,608.47 mi (2,588.57 km) |
