| Difficult Run to Arcore | 4,233.71 mi (6,813.50 km) |
| Difficult Run to Ardea | 4,510.70 mi (7,259.27 km) |
| Difficult Run to Arenzano | 4,245.78 mi (6,832.92 km) |
| Difficult Run to Arese | 4,225.67 mi (6,800.55 km) |
| Difficult Run to Arezzo | 4,416.47 mi (7,107.62 km) |
| Difficult Run to Argelato | 4,355.63 mi (7,009.71 km) |
| Difficult Run to Argenta | 4,375.09 mi (7,041.02 km) |
| Difficult Run to Ariano Irpino | 4,639.48 mi (7,466.52 km) |
| Difficult Run to Ariccia | 4,512.30 mi (7,261.84 km) |
| Difficult Run to Arluno | 4,221.54 mi (6,793.91 km) |
| Difficult Run to Arona | 4,197.36 mi (6,755.00 km) |
| Difficult Run to Artena | 4,522.74 mi (7,278.65 km) |
| Difficult Run to Arzachena | 4,387.68 mi (7,061.29 km) |
| Difficult Run to Arzano | 4,611.98 mi (7,422.26 km) |
| Difficult Run to Arzignano | 4,323.47 mi (6,957.95 km) |
