| Portage to Marrero (Louisiana) | 887.09 mi (1,427.63 km) |
| Portage to Marshall (Minnesota) | 535.26 mi (861.41 km) |
| Portage to Marshall (Missouri) | 452.04 mi (727.49 km) |
| Portage to Marshall (Texas) | 821.90 mi (1,322.71 km) |
| Portage to Marshalltown (Iowa) | 375.03 mi (603.55 km) |
| Portage to Marshfield (Wisconsin) | 285.95 mi (460.20 km) |
| Portage to Martha Lake (Washington) | 1,813.48 mi (2,918.51 km) |
| Portage to Martin (Tennessee) | 440.86 mi (709.49 km) |
| Portage to Martinez (California) | 1,937.08 mi (3,117.43 km) |
| Portage to Martinez (Georgia) | 629.04 mi (1,012.34 km) |
| Portage to Martinsburg (West Virginia) | 440.57 mi (709.03 km) |
| Portage to Martinsville (Indiana) | 197.39 mi (317.67 km) |
| Portage to Martinsville (New Jersey) | 581.02 mi (935.06 km) |
| Portage to Martinsville (Virginia) | 488.32 mi (785.88 km) |
| Portage to Maryland City (Maryland) | 507.53 mi (816.79 km) |
