| Difficult Run to Reichenbach/Vogtland | 4,198.32 mi (6,756.54 km) |
| Difficult Run to Reinbek | 4,033.66 mi (6,491.54 km) |
| Difficult Run to Reinfeld | 4,033.31 mi (6,490.98 km) |
| Difficult Run to Reinheim | 4,084.49 mi (6,573.36 km) |
| Difficult Run to Reiskirchen | 4,062.02 mi (6,537.19 km) |
| Difficult Run to Rellingen | 4,013.52 mi (6,459.14 km) |
| Difficult Run to Remagen | 3,998.56 mi (6,435.06 km) |
| Difficult Run to Remscheid | 3,980.59 mi (6,406.13 km) |
| Difficult Run to Rendsburg | 3,990.05 mi (6,421.36 km) |
| Difficult Run to Renningen | 4,120.30 mi (6,630.97 km) |
| Difficult Run to Reutlingen | 4,140.43 mi (6,663.38 km) |
| Difficult Run to Rhaude | 3,940.75 mi (6,342.02 km) |
| Difficult Run to Rheda-Wiedenbruck | 4,005.72 mi (6,446.58 km) |
| Difficult Run to Rhede | 3,943.21 mi (6,345.99 km) |
| Difficult Run to Rheinau | 4,082.10 mi (6,569.51 km) |
