| Difficult Run to Tonypandy | 3,539.03 mi (5,695.51 km) |
| Difficult Run to Tonyrefail | 3,540.62 mi (5,698.08 km) |
| Difficult Run to Torquay | 3,558.84 mi (5,727.40 km) |
| Difficult Run to Torton | 3,575.28 mi (5,753.86 km) |
| Difficult Run to Tottenham | 3,677.95 mi (5,919.09 km) |
| Difficult Run to Totteridge | 3,671.75 mi (5,909.11 km) |
| Difficult Run to Tottington | 3,545.86 mi (5,706.51 km) |
| Difficult Run to Towcester | 3,629.12 mi (5,840.50 km) |
| Difficult Run to Tranent | 3,481.75 mi (5,603.34 km) |
| Difficult Run to Tredegar | 3,544.63 mi (5,704.53 km) |
| Difficult Run to Trentham | 3,564.05 mi (5,735.79 km) |
| Difficult Run to Tring | 3,649.60 mi (5,873.46 km) |
| Difficult Run to Troon | 3,423.34 mi (5,509.34 km) |
| Difficult Run to Trowbridge | 3,596.30 mi (5,787.68 km) |
| Difficult Run to Truro | 3,498.91 mi (5,630.94 km) |
