| Boulder to Beocin | 5,634.52 mi (9,067.89 km) |
| Boulder to Blace | 5,785.45 mi (9,310.77 km) |
| Boulder to Bogatic | 5,646.34 mi (9,086.90 km) |
| Boulder to Bojnik | 5,813.95 mi (9,356.65 km) |
| Boulder to Boljevac | 5,776.98 mi (9,297.15 km) |
| Boulder to Bor | 5,764.92 mi (9,277.75 km) |
| Boulder to Borca | 5,674.29 mi (9,131.89 km) |
| Boulder to Bosilegrad | 5,865.45 mi (9,439.53 km) |
| Boulder to Brus | 5,772.58 mi (9,290.07 km) |
| Boulder to Bujanovac | 5,845.31 mi (9,407.12 km) |
| Boulder to Cacak | 5,723.82 mi (9,211.60 km) |
| Boulder to Cajetina | 5,711.52 mi (9,191.81 km) |
| Boulder to Cicevac | 5,767.43 mi (9,281.79 km) |
| Boulder to Coka | 5,608.06 mi (9,025.29 km) |
| Boulder to Crna Trava | 5,843.10 mi (9,403.57 km) |
