| Castle Rock to Marysville (California) | 893.82 mi (1,438.46 km) |
| Castle Rock to Marysville (Ohio) | 1,139.66 mi (1,834.11 km) |
| Castle Rock to Marysville (Washington) | 1,048.77 mi (1,687.84 km) |
| Castle Rock to Maryville (Missouri) | 533.39 mi (858.41 km) |
| Castle Rock to Maryville (Tennessee) | 1,167.65 mi (1,879.16 km) |
| Castle Rock to Mason (Ohio) | 1,095.38 mi (1,762.85 km) |
| Castle Rock to Mason City (Iowa) | 658.25 mi (1,059.35 km) |
| Castle Rock to Massapequa (New York) | 1,654.09 mi (2,662.00 km) |
| Castle Rock to Massapequa Park (New York) | 1,655.06 mi (2,663.56 km) |
| Castle Rock to Massillon (Ohio) | 1,233.45 mi (1,985.05 km) |
| Castle Rock to Mastic (New York) | 1,685.20 mi (2,712.07 km) |
| Castle Rock to Mastic Beach (New York) | 1,686.15 mi (2,713.59 km) |
| Castle Rock to Matteson (Illinois) | 909.97 mi (1,464.46 km) |
| Castle Rock to Matthews (North Carolina) | 1,355.70 mi (2,181.79 km) |
| Castle Rock to Mattoon (Illinois) | 878.93 mi (1,414.51 km) |
