| Boulder to Recica | 5,423.94 mi (8,728.99 km) |
| Boulder to Ribnica | 5,447.50 mi (8,766.90 km) |
| Boulder to Ribnica | 5,424.36 mi (8,729.66 km) |
| Boulder to Rogaska Slatina | 5,451.69 mi (8,773.65 km) |
| Boulder to Rogasovci | 5,434.80 mi (8,746.46 km) |
| Boulder to Rogatec | 5,454.20 mi (8,777.69 km) |
| Boulder to Ruse | 5,432.02 mi (8,741.99 km) |
| Boulder to Salovci | 5,442.09 mi (8,758.20 km) |
| Boulder to Selnica ob Dravi | 5,430.70 mi (8,739.87 km) |
| Boulder to Semic | 5,466.41 mi (8,797.34 km) |
| Boulder to Sempeter pri Gorici | 5,402.15 mi (8,693.92 km) |
| Boulder to Sencur | 5,411.77 mi (8,709.40 km) |
| Boulder to Sentilj | 5,428.91 mi (8,736.99 km) |
| Boulder to Sentjernej | 5,462.09 mi (8,790.39 km) |
| Boulder to Sentjur | 5,444.64 mi (8,762.29 km) |
