| Difficult Run to Jeffersonville (Indiana) | 452.58 mi (728.35 km) |
| Difficult Run to Jenison (Michigan) | 521.77 mi (839.71 km) |
| Difficult Run to Jenks (Oklahoma) | 1,039.27 mi (1,672.55 km) |
| Difficult Run to Jennings (Missouri) | 694.97 mi (1,118.44 km) |
| Difficult Run to Jensen Beach (Florida) | 822.61 mi (1,323.86 km) |
| Difficult Run to Jericho (New York) | 240.24 mi (386.63 km) |
| Difficult Run to Jerome (Idaho) | 1,945.66 mi (3,131.24 km) |
| Difficult Run to Jersey City (New Jersey) | 214.53 mi (345.26 km) |
| Difficult Run to Jessup (Maryland) | 35.04 mi (56.38 km) |
| Difficult Run to Johns Creek (Georgia) | 507.89 mi (817.38 km) |
| Difficult Run to Johnson City (New York) | 234.15 mi (376.83 km) |
| Difficult Run to Johnson City (Tennessee) | 327.32 mi (526.77 km) |
| Difficult Run to Johnston (Iowa) | 882.79 mi (1,420.72 km) |
| Difficult Run to Johnstown (Colorado) | 1,466.31 mi (2,359.80 km) |
| Difficult Run to Johnstown (Pennsylvania) | 129.18 mi (207.90 km) |
