| Difficult Run to Marietta (Georgia) | 525.88 mi (846.33 km) |
| Difficult Run to Marietta (Ohio) | 222.54 mi (358.14 km) |
| Difficult Run to Marina (California) | 2,407.38 mi (3,874.31 km) |
| Difficult Run to Marinette (Wisconsin) | 678.53 mi (1,091.99 km) |
| Difficult Run to Marion (Arkansas) | 752.87 mi (1,211.63 km) |
| Difficult Run to Marion (Illinois) | 633.26 mi (1,019.14 km) |
| Difficult Run to Marion (Indiana) | 456.01 mi (733.89 km) |
| Difficult Run to Marion (Iowa) | 778.15 mi (1,252.32 km) |
| Difficult Run to Marion (Ohio) | 328.34 mi (528.41 km) |
| Difficult Run to Marion Oaks (Florida) | 738.02 mi (1,187.73 km) |
| Difficult Run to Markham (Illinois) | 575.98 mi (926.95 km) |
| Difficult Run to Marlborough (Massachusetts) | 386.19 mi (621.52 km) |
| Difficult Run to Marlton (New Jersey) | 146.39 mi (235.60 km) |
| Difficult Run to Marquette (Michigan) | 733.45 mi (1,180.37 km) |
| Difficult Run to Marrero (Louisiana) | 956.19 mi (1,538.84 km) |
