| Forest Grove to Popovo | 6,014.20 mi (9,678.91 km) |
| Forest Grove to Provadia | 6,046.19 mi (9,730.40 km) |
| Forest Grove to Radnevo | 6,076.44 mi (9,779.09 km) |
| Forest Grove to Radomir | 6,003.19 mi (9,661.21 km) |
| Forest Grove to Rakitovo | 6,061.67 mi (9,755.32 km) |
| Forest Grove to Rakovski | 6,059.10 mi (9,751.18 km) |
| Forest Grove to Razgrad | 6,007.43 mi (9,668.02 km) |
| Forest Grove to Razlog | 6,055.92 mi (9,746.05 km) |
| Forest Grove to Ruse | 5,978.67 mi (9,621.74 km) |
| Forest Grove to Samokov | 6,028.74 mi (9,702.32 km) |
| Forest Grove to Sandanski | 6,072.31 mi (9,772.44 km) |
| Forest Grove to Sevlievo | 6,014.56 mi (9,679.50 km) |
| Forest Grove to Shumen | 6,030.96 mi (9,705.90 km) |
| Forest Grove to Silistra | 5,982.66 mi (9,628.16 km) |
| Forest Grove to Sliven | 6,059.03 mi (9,751.06 km) |
