| Walnut Park to Popovo | 6,643.43 mi (10,691.57 km) |
| Walnut Park to Provadia | 6,682.41 mi (10,754.30 km) |
| Walnut Park to Radnevo | 6,699.39 mi (10,781.62 km) |
| Walnut Park to Radomir | 6,607.50 mi (10,633.75 km) |
| Walnut Park to Rakitovo | 6,670.96 mi (10,735.87 km) |
| Walnut Park to Rakovski | 6,675.61 mi (10,743.36 km) |
| Walnut Park to Razgrad | 6,639.21 mi (10,684.78 km) |
| Walnut Park to Razlog | 6,660.60 mi (10,719.20 km) |
| Walnut Park to Ruse | 6,608.07 mi (10,634.66 km) |
| Walnut Park to Samokov | 6,636.10 mi (10,679.77 km) |
| Walnut Park to Sandanski | 6,674.29 mi (10,741.23 km) |
| Walnut Park to Sevlievo | 6,635.22 mi (10,678.36 km) |
| Walnut Park to Shumen | 6,664.40 mi (10,725.31 km) |
| Walnut Park to Silistra | 6,621.44 mi (10,656.18 km) |
| Walnut Park to Sliven | 6,686.17 mi (10,760.36 km) |
