| Difficult Run to Lydney | 3,574.78 mi (5,753.05 km) |
| Difficult Run to Lye | 3,576.95 mi (5,756.54 km) |
| Difficult Run to Lymington | 3,635.60 mi (5,850.93 km) |
| Difficult Run to Lymm | 3,544.77 mi (5,704.75 km) |
| Difficult Run to Mablethorpe | 3,653.68 mi (5,880.03 km) |
| Difficult Run to Macclesfield | 3,560.99 mi (5,730.85 km) |
| Difficult Run to Mackworth | 3,590.86 mi (5,778.93 km) |
| Difficult Run to Madeley | 3,560.08 mi (5,729.39 km) |
| Difficult Run to Maesteg | 3,531.08 mi (5,682.73 km) |
| Difficult Run to Maghull | 3,523.66 mi (5,670.78 km) |
| Difficult Run to Maidenhead | 3,653.14 mi (5,879.15 km) |
| Difficult Run to Maidstone | 3,709.57 mi (5,969.98 km) |
| Difficult Run to Maldon | 3,705.14 mi (5,962.84 km) |
| Difficult Run to Maltby | 3,594.00 mi (5,783.99 km) |
| Difficult Run to Manchester | 3,552.06 mi (5,716.49 km) |
