| River Grove to Hoddesdon | 3,949.50 mi (6,356.11 km) |
| River Grove to Holbeach | 3,917.34 mi (6,304.36 km) |
| River Grove to Holborn | 3,953.45 mi (6,362.46 km) |
| River Grove to Hollinwood | 3,815.28 mi (6,140.10 km) |
| River Grove to Holyhead | 3,728.19 mi (5,999.94 km) |
| River Grove to Holywell | 3,782.21 mi (6,086.88 km) |
| River Grove to Honiton | 3,857.53 mi (6,208.09 km) |
| River Grove to Horbury | 3,832.81 mi (6,168.31 km) |
| River Grove to Horley | 3,962.43 mi (6,376.91 km) |
| River Grove to Hornchurch | 3,964.67 mi (6,380.53 km) |
| River Grove to Horndean | 3,939.17 mi (6,339.48 km) |
| River Grove to Hornsey | 3,951.13 mi (6,358.74 km) |
| River Grove to Horsell | 3,942.54 mi (6,344.90 km) |
| River Grove to Horsforth | 3,824.33 mi (6,154.66 km) |
| River Grove to Horsham | 3,960.20 mi (6,373.33 km) |
