| Boulder to Jozefow | 5,306.96 mi (8,540.73 km) |
| Boulder to Kalisz | 5,239.99 mi (8,432.95 km) |
| Boulder to Kamien Pomorski | 5,034.12 mi (8,101.64 km) |
| Boulder to Kamienna Gora | 5,231.03 mi (8,418.53 km) |
| Boulder to Karczew | 5,310.09 mi (8,545.76 km) |
| Boulder to Kartuzy | 5,109.94 mi (8,223.65 km) |
| Boulder to Katowice | 5,344.53 mi (8,601.19 km) |
| Boulder to Kedzierzyn-Kozle | 5,316.66 mi (8,556.34 km) |
| Boulder to Kepno | 5,261.87 mi (8,468.16 km) |
| Boulder to Ketrzyn | 5,206.68 mi (8,379.34 km) |
| Boulder to Kety | 5,369.58 mi (8,641.50 km) |
| Boulder to Kielce | 5,357.89 mi (8,622.70 km) |
| Boulder to Kielczow | 5,246.15 mi (8,442.86 km) |
| Boulder to Klobuck | 5,308.01 mi (8,542.41 km) |
| Boulder to Klodzko | 5,267.11 mi (8,476.59 km) |
