| Glen Rock to Popovo | 4,797.55 mi (7,720.91 km) |
| Glen Rock to Provadia | 4,852.30 mi (7,809.02 km) |
| Glen Rock to Radnevo | 4,829.74 mi (7,772.71 km) |
| Glen Rock to Radomir | 4,697.64 mi (7,560.12 km) |
| Glen Rock to Rakitovo | 4,767.51 mi (7,672.57 km) |
| Glen Rock to Rakovski | 4,790.93 mi (7,710.26 km) |
| Glen Rock to Razgrad | 4,801.11 mi (7,726.63 km) |
| Glen Rock to Razlog | 4,746.22 mi (7,638.30 km) |
| Glen Rock to Ruse | 4,766.60 mi (7,671.11 km) |
| Glen Rock to Samokov | 4,731.23 mi (7,614.18 km) |
| Glen Rock to Sandanski | 4,751.55 mi (7,646.87 km) |
| Glen Rock to Sevlievo | 4,766.21 mi (7,670.47 km) |
| Glen Rock to Shumen | 4,828.22 mi (7,770.26 km) |
| Glen Rock to Silistra | 4,805.78 mi (7,734.15 km) |
| Glen Rock to Sliven | 4,829.67 mi (7,772.60 km) |
