| Difficult Run to Berg en Dal | 3,912.73 mi (6,296.92 km) |
| Difficult Run to Bergambacht | 3,864.86 mi (6,219.89 km) |
| Difficult Run to Bergeijk | 3,903.27 mi (6,281.71 km) |
| Difficult Run to Bergen | 3,843.89 mi (6,186.14 km) |
| Difficult Run to Bergen | 3,923.70 mi (6,314.59 km) |
| Difficult Run to Bergen op Zoom | 3,856.56 mi (6,206.53 km) |
| Difficult Run to Best | 3,900.05 mi (6,276.53 km) |
| Difficult Run to Beuningen | 3,905.49 mi (6,285.28 km) |
| Difficult Run to Beverwijk | 3,845.82 mi (6,189.25 km) |
| Difficult Run to Bilthoven | 3,876.33 mi (6,238.35 km) |
| Difficult Run to Bladel | 3,896.64 mi (6,271.04 km) |
| Difficult Run to Blaricum | 3,874.83 mi (6,235.94 km) |
| Difficult Run to Blerick | 3,933.87 mi (6,330.95 km) |
| Difficult Run to Bloemendaal | 3,845.92 mi (6,189.41 km) |
| Difficult Run to Bodegraven | 3,859.80 mi (6,211.74 km) |
