| Difficult Run to Zrece | 4,463.22 mi (7,182.85 km) |
| Difficult Run to Zuzemberk | 4,463.44 mi (7,183.22 km) |
| Difficult Run to Abaran | 3,974.86 mi (6,396.91 km) |
| Difficult Run to Abrera | 4,030.59 mi (6,486.61 km) |
| Difficult Run to Acala del Rio | 3,771.32 mi (6,069.36 km) |
| Difficult Run to Adeje | 3,507.11 mi (5,644.15 km) |
| Difficult Run to Adra | 3,940.70 mi (6,341.95 km) |
| Difficult Run to Aguilar | 3,836.49 mi (6,174.24 km) |
| Difficult Run to Aguilas | 3,990.80 mi (6,422.58 km) |
| Difficult Run to Alacuas | 3,981.59 mi (6,407.74 km) |
| Difficult Run to Alayor | 4,184.60 mi (6,734.47 km) |
| Difficult Run to Albacete | 3,928.62 mi (6,322.50 km) |
| Difficult Run to Albal | 3,985.71 mi (6,414.38 km) |
| Difficult Run to Albatera | 4,001.45 mi (6,439.71 km) |
| Difficult Run to Alberique | 3,989.24 mi (6,420.05 km) |
