| Boulder to Rothenbach an der Pegnitz | 5,148.65 mi (8,285.95 km) |
| Boulder to Rothenburg ob der Tauber | 5,119.35 mi (8,238.81 km) |
| Boulder to Rottweil | 5,125.98 mi (8,249.46 km) |
| Boulder to Rudersberg | 5,121.83 mi (8,242.79 km) |
| Boulder to Rudesheim am Rhein | 5,017.60 mi (8,075.05 km) |
| Boulder to Rudolstadt | 5,091.42 mi (8,193.86 km) |
| Boulder to Runkel | 5,005.23 mi (8,055.13 km) |
| Boulder to Ruppichteroth | 4,963.13 mi (7,987.39 km) |
| Boulder to Russelsheim | 5,032.79 mi (8,099.49 km) |
| Boulder to Rutesheim | 5,106.22 mi (8,217.67 km) |
| Boulder to Ruthen | 4,964.98 mi (7,990.37 km) |
| Boulder to Saalfeld | 5,095.89 mi (8,201.04 km) |
| Boulder to Saarbrucken | 5,021.62 mi (8,081.52 km) |
| Boulder to Saarlouis | 5,009.39 mi (8,061.84 km) |
| Boulder to Saarwellingen | 5,009.50 mi (8,062.02 km) |
