| Castro Valley to Bougival | 5,549.64 mi (8,931.29 km) |
| Castro Valley to Bouguenais | 5,517.34 mi (8,879.30 km) |
| Castro Valley to Boulogne-Billancourt | 5,554.24 mi (8,938.69 km) |
| Castro Valley to Boulogne-sur-Mer | 5,438.26 mi (8,752.03 km) |
| Castro Valley to Bourg-de-Peage | 5,839.89 mi (9,398.39 km) |
| Castro Valley to Bourg-en-Bresse | 5,782.93 mi (9,306.73 km) |
| Castro Valley to Bourg-la-Reine | 5,559.36 mi (8,946.92 km) |
| Castro Valley to Bourg-les-Valence | 5,839.91 mi (9,398.43 km) |
| Castro Valley to Bourges | 5,649.78 mi (9,092.44 km) |
| Castro Valley to Bourgoin-Jallieu | 5,817.44 mi (9,362.26 km) |
| Castro Valley to Bressuire | 5,570.98 mi (8,965.63 km) |
| Castro Valley to Brest | 5,364.03 mi (8,632.57 km) |
| Castro Valley to Bretigny-sur-Orge | 5,567.79 mi (8,960.49 km) |
| Castro Valley to Breuillet | 5,566.06 mi (8,957.71 km) |
| Castro Valley to Briancon | 5,896.09 mi (9,488.83 km) |
