| Difficult Run to Oswaldtwistle | 3,541.32 mi (5,699.20 km) |
| Difficult Run to Oswestry | 3,531.48 mi (5,683.36 km) |
| Difficult Run to Otley | 3,566.01 mi (5,738.95 km) |
| Difficult Run to Ovenden | 3,561.58 mi (5,731.81 km) |
| Difficult Run to Oxford | 3,626.19 mi (5,835.79 km) |
| Difficult Run to Oxted | 3,688.05 mi (5,935.34 km) |
| Difficult Run to Padbury | 3,634.00 mi (5,848.35 km) |
| Difficult Run to Padiham | 3,543.55 mi (5,702.79 km) |
| Difficult Run to Paignton | 3,558.19 mi (5,726.35 km) |
| Difficult Run to Paisley | 3,427.77 mi (5,516.47 km) |
| Difficult Run to Palmers Green | 3,675.83 mi (5,915.68 km) |
| Difficult Run to Parkstone | 3,619.84 mi (5,825.57 km) |
| Difficult Run to Partick | 3,431.63 mi (5,522.68 km) |
| Difficult Run to Patcham | 3,690.97 mi (5,940.05 km) |
| Difficult Run to Peebles | 3,477.58 mi (5,596.62 km) |
