| Boulder to Roeselare | 4,814.25 mi (7,747.78 km) |
| Boulder to Ronse | 4,838.86 mi (7,787.39 km) |
| Boulder to Rotselaar | 4,867.13 mi (7,832.90 km) |
| Boulder to Rumst | 4,851.47 mi (7,807.69 km) |
| Boulder to Saint-Ghislain | 4,859.40 mi (7,820.45 km) |
| Boulder to Saint-Nicolas | 4,908.71 mi (7,899.81 km) |
| Boulder to Saint-Vith | 4,944.50 mi (7,957.40 km) |
| Boulder to Scherpenheuvel | 4,873.19 mi (7,842.64 km) |
| Boulder to Schilde | 4,849.79 mi (7,804.98 km) |
| Boulder to Schoten | 4,846.84 mi (7,800.23 km) |
| Boulder to Seneffe | 4,870.32 mi (7,838.03 km) |
| Boulder to Seraing | 4,909.86 mi (7,901.66 km) |
| Boulder to Sint-Amandsberg | 4,830.50 mi (7,773.93 km) |
| Boulder to Sint-Andries | 4,805.12 mi (7,733.10 km) |
| Boulder to Sint-Genesius-Rode | 4,864.15 mi (7,828.10 km) |
