| Martha Lake to Smolyan | 5,935.59 mi (9,552.41 km) |
| Martha Lake to Sofia | 5,837.78 mi (9,394.99 km) |
| Martha Lake to Sopot | 5,867.97 mi (9,443.59 km) |
| Martha Lake to Sozopol | 5,935.95 mi (9,552.99 km) |
| Martha Lake to Sredets | 5,931.62 mi (9,546.02 km) |
| Martha Lake to Stamboliyski | 5,897.10 mi (9,490.46 km) |
| Martha Lake to Stara Zagora | 5,898.54 mi (9,492.78 km) |
| Martha Lake to Svilengrad | 5,951.61 mi (9,578.18 km) |
| Martha Lake to Svishtov | 5,816.80 mi (9,361.23 km) |
| Martha Lake to Targovishte | 5,862.46 mi (9,434.72 km) |
| Martha Lake to Teteven | 5,841.79 mi (9,401.46 km) |
| Martha Lake to Troyan | 5,852.36 mi (9,418.46 km) |
| Martha Lake to Tryavna | 5,867.84 mi (9,443.37 km) |
| Martha Lake to Tutrakan | 5,811.25 mi (9,352.30 km) |
| Martha Lake to Varna | 5,887.59 mi (9,475.15 km) |
