| Difficult Run to Middletown (Ohio) | 377.99 mi (608.32 km) |
| Difficult Run to Midland (Michigan) | 483.76 mi (778.53 km) |
| Difficult Run to Midland (Texas) | 1,467.08 mi (2,361.04 km) |
| Difficult Run to Midlothian (Illinois) | 578.14 mi (930.42 km) |
| Difficult Run to Midlothian (Texas) | 1,185.51 mi (1,907.89 km) |
| Difficult Run to Midlothian (Virginia) | 99.23 mi (159.69 km) |
| Difficult Run to Midvale (Utah) | 1,826.94 mi (2,940.18 km) |
| Difficult Run to Midway (Florida) | 802.80 mi (1,291.98 km) |
| Difficult Run to Midwest City (Oklahoma) | 1,125.13 mi (1,810.71 km) |
| Difficult Run to Milford (Delaware) | 103.47 mi (166.52 km) |
| Difficult Run to Milford city (Connecticut) | 277.64 mi (446.81 km) |
| Difficult Run to Milford Mill (Maryland) | 43.63 mi (70.22 km) |
| Difficult Run to Mililani Mauka (Hawaii) | 4,813.03 mi (7,745.82 km) |
| Difficult Run to Mililani Town (Hawaii) | 4,815.23 mi (7,749.36 km) |
| Difficult Run to Mill Creek (Washington) | 2,300.92 mi (3,702.97 km) |
