| Castle Rock to Bilecik | 6,248.52 mi (10,056.02 km) |
| Castle Rock to Bingol | 6,601.98 mi (10,624.87 km) |
| Castle Rock to Birecik | 6,653.74 mi (10,708.16 km) |
| Castle Rock to Bitlis | 6,669.79 mi (10,733.99 km) |
| Castle Rock to Bodrum | 6,348.91 mi (10,217.59 km) |
| Castle Rock to Bogazliyan | 6,450.83 mi (10,381.61 km) |
| Castle Rock to Bolu | 6,260.40 mi (10,075.14 km) |
| Castle Rock to Bolvadin | 6,362.30 mi (10,239.14 km) |
| Castle Rock to Bor | 6,510.84 mi (10,478.19 km) |
| Castle Rock to Borcka | 6,474.81 mi (10,420.21 km) |
| Castle Rock to Boyabat | 6,302.31 mi (10,142.58 km) |
| Castle Rock to Bozdogan | 6,340.46 mi (10,203.98 km) |
| Castle Rock to Bozkir | 6,486.35 mi (10,438.78 km) |
| Castle Rock to Bozkurt | 6,372.04 mi (10,254.81 km) |
| Castle Rock to Bozuyuk | 6,263.78 mi (10,080.59 km) |
