| Blackrock to Popovo | 1,621.71 mi (2,609.88 km) |
| Blackrock to Provadia | 1,677.12 mi (2,699.06 km) |
| Blackrock to Radnevo | 1,653.77 mi (2,661.49 km) |
| Blackrock to Radomir | 1,524.42 mi (2,453.32 km) |
| Blackrock to Rakitovo | 1,594.03 mi (2,565.35 km) |
| Blackrock to Rakovski | 1,615.65 mi (2,600.14 km) |
| Blackrock to Razgrad | 1,625.68 mi (2,616.28 km) |
| Blackrock to Razlog | 1,574.20 mi (2,533.43 km) |
| Blackrock to Ruse | 1,591.16 mi (2,560.72 km) |
| Blackrock to Samokov | 1,557.62 mi (2,506.75 km) |
| Blackrock to Sandanski | 1,581.15 mi (2,544.61 km) |
| Blackrock to Sevlievo | 1,590.09 mi (2,559.00 km) |
| Blackrock to Shumen | 1,652.76 mi (2,659.86 km) |
| Blackrock to Silistra | 1,632.54 mi (2,627.32 km) |
| Blackrock to Sliven | 1,653.50 mi (2,661.05 km) |
