| Difficult Run to Carterton | 3,612.48 mi (5,813.73 km) |
| Difficult Run to Castle Bromwich | 3,589.34 mi (5,776.49 km) |
| Difficult Run to Castleford | 3,582.60 mi (5,765.64 km) |
| Difficult Run to Castleton | 3,552.80 mi (5,717.68 km) |
| Difficult Run to Caterham | 3,684.44 mi (5,929.53 km) |
| Difficult Run to Catford | 3,683.25 mi (5,927.62 km) |
| Difficult Run to Caversham | 3,643.88 mi (5,864.26 km) |
| Difficult Run to Chaddesden | 3,594.76 mi (5,785.21 km) |
| Difficult Run to Chalfont Saint Peter | 3,657.88 mi (5,886.79 km) |
| Difficult Run to Chandlers Ford | 3,637.60 mi (5,854.15 km) |
| Difficult Run to Chapel en le Frith | 3,568.06 mi (5,742.24 km) |
| Difficult Run to Chapeltown | 3,583.19 mi (5,766.59 km) |
| Difficult Run to Chard | 3,574.45 mi (5,752.52 km) |
| Difficult Run to Charlton Kings | 3,591.46 mi (5,779.89 km) |
| Difficult Run to Chatham | 3,706.98 mi (5,965.81 km) |
