| Barstow to Marysville (California) | 387.60 mi (623.79 km) |
| Barstow to Marysville (Ohio) | 1,870.53 mi (3,010.33 km) |
| Barstow to Marysville (Washington) | 950.03 mi (1,528.93 km) |
| Barstow to Maryville (Missouri) | 1,267.60 mi (2,040.00 km) |
| Barstow to Maryville (Tennessee) | 1,856.68 mi (2,988.04 km) |
| Barstow to Mason (Ohio) | 1,820.48 mi (2,929.77 km) |
| Barstow to Mason City (Iowa) | 1,396.03 mi (2,246.69 km) |
| Barstow to Massapequa (New York) | 2,388.83 mi (3,844.45 km) |
| Barstow to Massapequa Park (New York) | 2,389.85 mi (3,846.09 km) |
| Barstow to Massillon (Ohio) | 1,967.21 mi (3,165.92 km) |
| Barstow to Mastic (New York) | 2,420.51 mi (3,895.43 km) |
| Barstow to Mastic Beach (New York) | 2,421.33 mi (3,896.76 km) |
| Barstow to Matteson (Illinois) | 1,647.16 mi (2,650.84 km) |
| Barstow to Matthews (North Carolina) | 2,045.22 mi (3,291.47 km) |
| Barstow to Mattoon (Illinois) | 1,603.94 mi (2,581.29 km) |
