| Difficult Run to Town and Country (Missouri) | 707.08 mi (1,137.94 km) |
| Difficult Run to Towson (Maryland) | 51.78 mi (83.34 km) |
| Difficult Run to Tracy (California) | 2,368.83 mi (3,812.27 km) |
| Difficult Run to Traverse City (Michigan) | 586.15 mi (943.32 km) |
| Difficult Run to Travilah (Maryland) | 12.01 mi (19.33 km) |
| Difficult Run to Trenton (Michigan) | 379.74 mi (611.14 km) |
| Difficult Run to Trenton (New Jersey) | 165.14 mi (265.76 km) |
| Difficult Run to Trenton (Ohio) | 382.99 mi (616.36 km) |
| Difficult Run to Triangle (Virginia) | 24.46 mi (39.36 km) |
| Difficult Run to Trinity (Florida) | 800.98 mi (1,289.06 km) |
| Difficult Run to Trophy Club (Texas) | 1,179.27 mi (1,897.86 km) |
| Difficult Run to Trotwood (Ohio) | 377.34 mi (607.26 km) |
| Difficult Run to Troutdale (Oregon) | 2,318.70 mi (3,731.58 km) |
| Difficult Run to Troy (Alabama) | 689.67 mi (1,109.91 km) |
| Difficult Run to Troy (Illinois) | 675.25 mi (1,086.71 km) |
