| Difficult Run to Zottegem | 3,852.44 mi (6,199.90 km) |
| Difficult Run to Zulte | 3,836.30 mi (6,173.92 km) |
| Difficult Run to Zwevegem | 3,835.16 mi (6,172.09 km) |
| Difficult Run to Zwijndrecht | 3,865.08 mi (6,220.25 km) |
| Difficult Run to Asenovgrad | 5,020.41 mi (8,079.57 km) |
| Difficult Run to Aytos | 5,087.76 mi (8,187.97 km) |
| Difficult Run to Balchik | 5,092.57 mi (8,195.70 km) |
| Difficult Run to Bankya | 4,921.22 mi (7,919.94 km) |
| Difficult Run to Bansko | 4,971.10 mi (8,000.21 km) |
| Difficult Run to Berkovitsa | 4,898.89 mi (7,883.99 km) |
| Difficult Run to Blagoevgrad | 4,947.47 mi (7,962.19 km) |
| Difficult Run to Botevgrad | 4,939.76 mi (7,949.78 km) |
| Difficult Run to Burgas | 5,104.99 mi (8,215.69 km) |
| Difficult Run to Byala Slatina | 4,922.53 mi (7,922.05 km) |
| Difficult Run to Chirpan | 5,031.42 mi (8,097.29 km) |
