| Martha Lake to Popovo | 5,849.82 mi (9,414.38 km) |
| Martha Lake to Provadia | 5,881.54 mi (9,465.42 km) |
| Martha Lake to Radnevo | 5,912.30 mi (9,514.92 km) |
| Martha Lake to Radomir | 5,839.95 mi (9,398.49 km) |
| Martha Lake to Rakitovo | 5,898.15 mi (9,492.16 km) |
| Martha Lake to Rakovski | 5,895.24 mi (9,487.48 km) |
| Martha Lake to Razgrad | 5,842.95 mi (9,403.33 km) |
| Martha Lake to Razlog | 5,892.62 mi (9,483.26 km) |
| Martha Lake to Ruse | 5,814.30 mi (9,357.21 km) |
| Martha Lake to Samokov | 5,865.33 mi (9,439.34 km) |
| Martha Lake to Sandanski | 5,909.15 mi (9,509.85 km) |
| Martha Lake to Sevlievo | 5,850.54 mi (9,415.54 km) |
| Martha Lake to Shumen | 5,866.42 mi (9,441.09 km) |
| Martha Lake to Silistra | 5,817.94 mi (9,363.06 km) |
| Martha Lake to Sliven | 5,894.72 mi (9,486.63 km) |
