| Castle Rock to Karlovo | 5,953.48 mi (9,581.21 km) |
| Castle Rock to Karnobat | 6,018.94 mi (9,686.55 km) |
| Castle Rock to Kavarna | 6,012.45 mi (9,676.10 km) |
| Castle Rock to Kazanlak | 5,972.87 mi (9,612.41 km) |
| Castle Rock to Knezha | 5,884.22 mi (9,469.75 km) |
| Castle Rock to Kostinbrod | 5,895.23 mi (9,487.46 km) |
| Castle Rock to Kozloduy | 5,858.05 mi (9,427.62 km) |
| Castle Rock to Kyustendil | 5,907.72 mi (9,507.56 km) |
| Castle Rock to Levski | 5,923.14 mi (9,532.38 km) |
| Castle Rock to Lom | 5,840.68 mi (9,399.66 km) |
| Castle Rock to Lovech | 5,923.54 mi (9,533.02 km) |
| Castle Rock to Lukovit | 5,903.29 mi (9,500.42 km) |
| Castle Rock to Lyaskovets | 5,955.37 mi (9,584.24 km) |
| Castle Rock to Mezdra | 5,891.82 mi (9,481.97 km) |
| Castle Rock to Momchilgrad | 6,033.78 mi (9,710.42 km) |
