| Boulder to Kluczbork | 5,284.13 mi (8,503.99 km) |
| Boulder to Knurow | 5,337.58 mi (8,590.00 km) |
| Boulder to Kobylka | 5,295.37 mi (8,522.08 km) |
| Boulder to Kokoszki | 5,116.66 mi (8,234.46 km) |
| Boulder to Kolbuszowa | 5,422.72 mi (8,727.02 km) |
| Boulder to Kolno | 5,256.92 mi (8,460.20 km) |
| Boulder to Kolo | 5,232.45 mi (8,420.82 km) |
| Boulder to Kolobrzeg | 5,046.32 mi (8,121.27 km) |
| Boulder to Koluszki | 5,288.36 mi (8,510.80 km) |
| Boulder to Komorniki | 5,174.65 mi (8,327.79 km) |
| Boulder to Konin | 5,221.38 mi (8,403.00 km) |
| Boulder to Konskie | 5,334.54 mi (8,585.12 km) |
| Boulder to Konstancin-Jeziorna | 5,306.51 mi (8,540.00 km) |
| Boulder to Konstantynow Lodzki | 5,275.46 mi (8,490.02 km) |
| Boulder to Koronowo | 5,155.18 mi (8,296.47 km) |
