| Castricum to Plombieres | 137.05 mi (220.56 km) |
| Castricum to Pont-a-Celles | 142.29 mi (229.00 km) |
| Castricum to Poperinge | 143.62 mi (231.13 km) |
| Castricum to Profondeville | 150.40 mi (242.05 km) |
| Castricum to Putte | 103.65 mi (166.81 km) |
| Castricum to Puurs | 103.17 mi (166.03 km) |
| Castricum to Quaregnon | 150.24 mi (241.79 km) |
| Castricum to Raeren | 143.19 mi (230.44 km) |
| Castricum to Ranst | 93.41 mi (150.33 km) |
| Castricum to Ravels | 82.98 mi (133.54 km) |
| Castricum to Retie | 90.29 mi (145.31 km) |
| Castricum to Riemst | 126.79 mi (204.05 km) |
| Castricum to Rijkevorsel | 83.02 mi (133.61 km) |
| Castricum to Rixensart | 126.80 mi (204.06 km) |
| Castricum to Rochefort | 166.37 mi (267.75 km) |
