| Castle Rock to Mouscron | 4,847.53 mi (7,801.34 km) |
| Castle Rock to Namur | 4,915.25 mi (7,910.34 km) |
| Castle Rock to Neder-Over-Heembeek | 4,879.88 mi (7,853.40 km) |
| Castle Rock to Neerpelt | 4,900.32 mi (7,886.30 km) |
| Castle Rock to Nevele | 4,845.91 mi (7,798.74 km) |
| Castle Rock to Niel | 4,868.72 mi (7,835.44 km) |
| Castle Rock to Nieuwpoort | 4,815.14 mi (7,749.22 km) |
| Castle Rock to Nijlen | 4,877.15 mi (7,849.01 km) |
| Castle Rock to Ninove | 4,870.40 mi (7,838.16 km) |
| Castle Rock to Nivelles | 4,891.50 mi (7,872.10 km) |
| Castle Rock to Olen | 4,884.57 mi (7,860.96 km) |
| Castle Rock to Oostakker | 4,850.35 mi (7,805.89 km) |
| Castle Rock to Oosterzele | 4,857.99 mi (7,818.18 km) |
| Castle Rock to Oostkamp | 4,830.02 mi (7,773.17 km) |
| Castle Rock to Opglabbeek | 4,913.44 mi (7,907.42 km) |
