| Boulder to Bougival | 4,871.11 mi (7,839.29 km) |
| Boulder to Bouguenais | 4,806.94 mi (7,736.02 km) |
| Boulder to Boulogne-Billancourt | 4,875.98 mi (7,847.14 km) |
| Boulder to Boulogne-sur-Mer | 4,772.36 mi (7,680.36 km) |
| Boulder to Bourg-de-Peage | 5,147.20 mi (8,283.63 km) |
| Boulder to Bourg-en-Bresse | 5,099.93 mi (8,207.55 km) |
| Boulder to Bourg-la-Reine | 4,881.03 mi (7,855.26 km) |
| Boulder to Bourg-les-Valence | 5,145.72 mi (8,281.24 km) |
| Boulder to Bourges | 4,958.52 mi (7,979.96 km) |
| Boulder to Bourgoin-Jallieu | 5,130.04 mi (8,256.00 km) |
| Boulder to Bressuire | 4,863.40 mi (7,826.88 km) |
| Boulder to Brest | 4,650.04 mi (7,483.52 km) |
| Boulder to Bretigny-sur-Orge | 4,888.07 mi (7,866.59 km) |
| Boulder to Breuillet | 4,885.30 mi (7,862.12 km) |
| Boulder to Briancon | 5,211.13 mi (8,386.50 km) |
