| Difficult Run to Attleboro (Massachusetts) | 380.86 mi (612.94 km) |
| Difficult Run to Atwater (California) | 2,330.91 mi (3,751.24 km) |
| Difficult Run to Auburn (Alabama) | 629.98 mi (1,013.85 km) |
| Difficult Run to Auburn (California) | 2,328.26 mi (3,746.97 km) |
| Difficult Run to Auburn (Indiana) | 441.19 mi (710.02 km) |
| Difficult Run to Auburn (Maine) | 512.66 mi (825.05 km) |
| Difficult Run to Auburn (New York) | 281.54 mi (453.10 km) |
| Difficult Run to Auburn (Washington) | 2,302.40 mi (3,705.35 km) |
| Difficult Run to Auburn Hills (Michigan) | 403.68 mi (649.67 km) |
| Difficult Run to Auburndale (Florida) | 789.16 mi (1,270.03 km) |
| Difficult Run to Augusta (Georgia) | 464.43 mi (747.43 km) |
| Difficult Run to Augusta (Maine) | 543.25 mi (874.28 km) |
| Difficult Run to Aurora (Colorado) | 1,459.02 mi (2,348.06 km) |
| Difficult Run to Aurora (Illinois) | 608.83 mi (979.81 km) |
| Difficult Run to Aurora (Ohio) | 268.96 mi (432.85 km) |
