| Difficult Run to Oststeinbek | 4,029.59 mi (6,485.00 km) |
| Difficult Run to Ottendorf-Okrilla | 4,239.67 mi (6,823.09 km) |
| Difficult Run to Ottersberg | 4,003.58 mi (6,443.14 km) |
| Difficult Run to Ottobrunn | 4,253.90 mi (6,845.99 km) |
| Difficult Run to Ottweiler | 4,030.21 mi (6,486.00 km) |
| Difficult Run to Overath | 3,991.01 mi (6,422.90 km) |
| Difficult Run to Oyten | 3,999.63 mi (6,436.78 km) |
| Difficult Run to Paderborn | 4,026.93 mi (6,480.71 km) |
| Difficult Run to Papenburg | 3,937.64 mi (6,337.02 km) |
| Difficult Run to Parchim | 4,095.58 mi (6,591.21 km) |
| Difficult Run to Pasewalk | 4,173.30 mi (6,716.28 km) |
| Difficult Run to Passau | 4,310.16 mi (6,936.54 km) |
| Difficult Run to Pattensen | 4,050.61 mi (6,518.83 km) |
| Difficult Run to Pegnitz | 4,195.41 mi (6,751.85 km) |
| Difficult Run to Peine | 4,067.01 mi (6,545.22 km) |
