| Difficult Run to Yverdon-les-Bains | 4,083.88 mi (6,572.37 km) |
| Difficult Run to Zofingen | 4,123.49 mi (6,636.12 km) |
| Difficult Run to Zollikon | 4,148.80 mi (6,676.85 km) |
| Difficult Run to Zuchwil | 4,110.08 mi (6,614.54 km) |
| Difficult Run to Zug | 4,151.57 mi (6,681.31 km) |
| Difficult Run to Zurich | 4,146.25 mi (6,672.75 km) |
| Difficult Run to Ra's al `Ayn | 5,862.17 mi (9,434.25 km) |
| Difficult Run to Tall Abyad | 5,826.75 mi (9,377.24 km) |
| Difficult Run to Acarlar | 5,320.29 mi (8,562.18 km) |
| Difficult Run to Acigol | 5,563.38 mi (8,953.40 km) |
| Difficult Run to Acipayam | 5,404.97 mi (8,698.45 km) |
| Difficult Run to Adakli | 5,759.00 mi (9,268.21 km) |
| Difficult Run to Adana | 5,668.74 mi (9,122.96 km) |
| Difficult Run to Adilcevaz | 5,863.77 mi (9,436.83 km) |
| Difficult Run to Adiyaman | 5,748.12 mi (9,250.71 km) |
