| Difficult Run to Prokuplje | 4,836.14 mi (7,783.02 km) |
| Difficult Run to Raca | 4,772.03 mi (7,679.84 km) |
| Difficult Run to Raska | 4,793.75 mi (7,714.80 km) |
| Difficult Run to Razanj | 4,817.50 mi (7,753.01 km) |
| Difficult Run to Rekovac | 4,792.54 mi (7,712.84 km) |
| Difficult Run to Ruma | 4,695.51 mi (7,556.70 km) |
| Difficult Run to Sabac | 4,699.16 mi (7,562.57 km) |
| Difficult Run to Secanj | 4,719.44 mi (7,595.20 km) |
| Difficult Run to Senta | 4,670.36 mi (7,516.22 km) |
| Difficult Run to Sid | 4,666.63 mi (7,510.21 km) |
| Difficult Run to Sjenica | 4,769.21 mi (7,675.30 km) |
| Difficult Run to Smederevo | 4,753.04 mi (7,649.27 km) |
| Difficult Run to Smederevska Palanka | 4,765.86 mi (7,669.91 km) |
| Difficult Run to Sokobanja | 4,831.12 mi (7,774.94 km) |
| Difficult Run to Sombor | 4,636.76 mi (7,462.14 km) |
