| Boulder to Kortenberg | 4,864.25 mi (7,828.25 km) |
| Boulder to Kortrijk | 4,823.96 mi (7,763.41 km) |
| Boulder to Kraainem | 4,862.66 mi (7,825.69 km) |
| Boulder to Kruibeke | 4,843.89 mi (7,795.49 km) |
| Boulder to Kuurne | 4,823.80 mi (7,763.15 km) |
| Boulder to La Bruyere | 4,890.26 mi (7,870.12 km) |
| Boulder to La Calamine | 4,921.13 mi (7,919.79 km) |
| Boulder to La Louviere | 4,871.04 mi (7,839.18 km) |
| Boulder to Laarne | 4,835.51 mi (7,782.00 km) |
| Boulder to Laeken | 4,858.57 mi (7,819.11 km) |
| Boulder to Lanaken | 4,900.86 mi (7,887.17 km) |
| Boulder to Landen | 4,888.24 mi (7,866.86 km) |
| Boulder to Lebbeke | 4,845.16 mi (7,797.54 km) |
| Boulder to Lede | 4,842.18 mi (7,792.73 km) |
| Boulder to Ledegem | 4,818.36 mi (7,754.41 km) |
