| Difficult Run to Yuncos | 3,799.70 mi (6,115.03 km) |
| Difficult Run to Zafra | 3,722.98 mi (5,991.56 km) |
| Difficult Run to Zamora | 3,669.98 mi (5,906.26 km) |
| Difficult Run to Zaragoza | 3,896.58 mi (6,270.93 km) |
| Difficult Run to Zarautz | 3,791.05 mi (6,101.10 km) |
| Difficult Run to Zuera | 3,894.71 mi (6,267.94 km) |
| Difficult Run to Zumaia | 3,786.50 mi (6,093.78 km) |
| Difficult Run to Zumarraga | 3,789.53 mi (6,098.66 km) |
| Difficult Run to Longyearbyen | 3,638.73 mi (5,855.97 km) |
| Difficult Run to Ahus | 4,110.29 mi (6,614.88 km) |
| Difficult Run to Akersberga | 4,135.94 mi (6,656.15 km) |
| Difficult Run to Alingsas | 3,992.93 mi (6,426.00 km) |
| Difficult Run to Almhult | 4,086.43 mi (6,576.47 km) |
| Difficult Run to Alta | 4,139.44 mi (6,661.78 km) |
| Difficult Run to Amal | 3,968.44 mi (6,386.59 km) |
