| Difficult Run to Foix | 3,973.72 mi (6,395.09 km) |
| Difficult Run to Fondettes | 3,806.37 mi (6,125.75 km) |
| Difficult Run to Fonsorbes | 3,939.99 mi (6,340.80 km) |
| Difficult Run to Fontaine | 4,090.16 mi (6,582.48 km) |
| Difficult Run to Fontaine-les-Dijon | 3,998.22 mi (6,434.51 km) |
| Difficult Run to Fontainebleau | 3,870.42 mi (6,228.84 km) |
| Difficult Run to Fontenay-aux-Roses | 3,843.03 mi (6,184.75 km) |
| Difficult Run to Fontenay-le-Comte | 3,768.83 mi (6,065.34 km) |
| Difficult Run to Fontenay-le-Fleury | 3,832.25 mi (6,167.42 km) |
| Difficult Run to Fontenay-sous-Bois | 3,849.36 mi (6,194.95 km) |
| Difficult Run to Forbach | 4,024.32 mi (6,476.52 km) |
| Difficult Run to Fos-sur-Mer | 4,110.32 mi (6,614.92 km) |
| Difficult Run to Fosses | 3,844.24 mi (6,186.70 km) |
| Difficult Run to Fouesnant | 3,593.44 mi (5,783.09 km) |
| Difficult Run to Fougeres | 3,705.10 mi (5,962.79 km) |
