| Boulder to Rodgau | 5,047.10 mi (8,122.52 km) |
| Boulder to Roding | 5,202.91 mi (8,373.28 km) |
| Boulder to Rodinghausen | 4,929.46 mi (7,933.21 km) |
| Boulder to Roetgen | 4,930.00 mi (7,934.06 km) |
| Boulder to Rommerskirchen | 4,928.55 mi (7,931.73 km) |
| Boulder to Ronnenberg | 4,962.94 mi (7,987.08 km) |
| Boulder to Rosbach vor der Hohe | 5,027.90 mi (8,091.63 km) |
| Boulder to Rosdorf | 5,009.29 mi (8,061.67 km) |
| Boulder to Rosenheim | 5,257.19 mi (8,460.63 km) |
| Boulder to Rosrath | 4,950.73 mi (7,967.43 km) |
| Boulder to Rossdorf | 5,050.42 mi (8,127.86 km) |
| Boulder to Rosstal | 5,141.10 mi (8,273.80 km) |
| Boulder to Rostock | 4,953.05 mi (7,971.16 km) |
| Boulder to Rotenburg an der Fulda | 5,027.79 mi (8,091.45 km) |
| Boulder to Roth | 5,155.23 mi (8,296.54 km) |
