| Prairie Ridge to Karlovo | 5,912.27 mi (9,514.88 km) |
| Prairie Ridge to Karnobat | 5,952.86 mi (9,580.20 km) |
| Prairie Ridge to Kavarna | 5,924.33 mi (9,534.28 km) |
| Prairie Ridge to Kazanlak | 5,925.12 mi (9,535.56 km) |
| Prairie Ridge to Knezha | 5,843.70 mi (9,404.53 km) |
| Prairie Ridge to Kostinbrod | 5,870.52 mi (9,447.69 km) |
| Prairie Ridge to Kozloduy | 5,818.93 mi (9,364.67 km) |
| Prairie Ridge to Kyustendil | 5,893.84 mi (9,485.22 km) |
| Prairie Ridge to Levski | 5,871.97 mi (9,450.03 km) |
| Prairie Ridge to Lom | 5,806.69 mi (9,344.97 km) |
| Prairie Ridge to Lovech | 5,879.08 mi (9,461.47 km) |
| Prairie Ridge to Lukovit | 5,864.47 mi (9,437.96 km) |
| Prairie Ridge to Lyaskovets | 5,899.87 mi (9,494.92 km) |
| Prairie Ridge to Mezdra | 5,858.70 mi (9,428.67 km) |
| Prairie Ridge to Momchilgrad | 5,995.10 mi (9,648.18 km) |
