| Keystone to Murray (Kentucky) | 674.19 mi (1,085.01 km) |
| Keystone to Murray (Utah) | 1,868.18 mi (3,006.54 km) |
| Keystone to Murraysville (North Carolina) | 509.94 mi (820.67 km) |
| Keystone to Murrieta (California) | 2,076.11 mi (3,341.18 km) |
| Keystone to Murrysville (Pennsylvania) | 867.14 mi (1,395.52 km) |
| Keystone to Muscatine (Iowa) | 1,035.01 mi (1,665.69 km) |
| Keystone to Muscle Shoals (Alabama) | 544.58 mi (876.41 km) |
| Keystone to Muscoy (California) | 2,086.12 mi (3,357.28 km) |
| Keystone to Muskego (Wisconsin) | 1,065.19 mi (1,714.25 km) |
| Keystone to Muskegon (Michigan) | 1,062.79 mi (1,710.40 km) |
| Keystone to Muskogee (Oklahoma) | 913.05 mi (1,469.42 km) |
| Keystone to Mustang (Oklahoma) | 1,018.61 mi (1,639.30 km) |
| Keystone to Myers Corner (New York) | 1,051.57 mi (1,692.34 km) |
| Keystone to Myrtle Beach (South Carolina) | 443.81 mi (714.24 km) |
| Keystone to Myrtle Grove (Florida) | 324.38 mi (522.04 km) |
