| Difficult Run to Nowy Dwor Mazowiecki | 4,453.45 mi (7,167.13 km) |
| Difficult Run to Nowy Sacz | 4,555.31 mi (7,331.06 km) |
| Difficult Run to Nowy Targ | 4,535.31 mi (7,298.87 km) |
| Difficult Run to Nowy Tomysl | 4,289.89 mi (6,903.92 km) |
| Difficult Run to Nysa | 4,397.37 mi (7,076.89 km) |
| Difficult Run to Oborniki | 4,304.11 mi (6,926.80 km) |
| Difficult Run to Oborniki Slaskie | 4,352.67 mi (7,004.94 km) |
| Difficult Run to Olawa | 4,380.16 mi (7,049.19 km) |
| Difficult Run to Olecko | 4,458.33 mi (7,174.99 km) |
| Difficult Run to Olesnica | 4,374.14 mi (7,039.50 km) |
| Difficult Run to Olesno | 4,424.24 mi (7,120.13 km) |
| Difficult Run to Olkusz | 4,488.56 mi (7,223.64 km) |
| Difficult Run to Olsztyn | 4,397.16 mi (7,076.55 km) |
| Difficult Run to Opalenica | 4,300.59 mi (6,921.13 km) |
| Difficult Run to Opoczno | 4,475.86 mi (7,203.20 km) |
