| Boulder to Boekel | 4,869.53 mi (7,836.75 km) |
| Boulder to Bolsward | 4,799.58 mi (7,724.17 km) |
| Boulder to Borger | 4,845.77 mi (7,798.52 km) |
| Boulder to Borne | 4,872.75 mi (7,841.93 km) |
| Boulder to Boskoop | 4,815.56 mi (7,749.90 km) |
| Boulder to Boxmeer | 4,876.48 mi (7,847.94 km) |
| Boulder to Boxtel | 4,859.40 mi (7,820.45 km) |
| Boulder to Breda | 4,840.88 mi (7,790.64 km) |
| Boulder to Breukelen | 4,822.34 mi (7,760.81 km) |
| Boulder to Brielle | 4,807.10 mi (7,736.28 km) |
| Boulder to Bronkhorst | 4,864.45 mi (7,828.57 km) |
| Boulder to Brummen | 4,863.38 mi (7,826.85 km) |
| Boulder to Brunssum | 4,908.69 mi (7,899.78 km) |
| Boulder to Bunnik | 4,835.27 mi (7,781.62 km) |
| Boulder to Burgum | 4,808.38 mi (7,738.34 km) |
