| Merthyr Tudful to Lake Grove (New York) | 3,280.40 mi (5,279.29 km) |
| Merthyr Tudful to Lake Havasu City (Arizona) | 5,167.08 mi (8,315.62 km) |
| Merthyr Tudful to Lake Hopatcong (New Jersey) | 3,337.39 mi (5,371.01 km) |
| Merthyr Tudful to Lake in the Hills (Illinois) | 3,828.94 mi (6,162.09 km) |
| Merthyr Tudful to Lake Jackson (Texas) | 4,753.21 mi (7,649.55 km) |
| Merthyr Tudful to Lake Los Angeles (California) | 5,279.20 mi (8,496.06 km) |
| Merthyr Tudful to Lake Magdalene (Florida) | 4,267.98 mi (6,868.65 km) |
| Merthyr Tudful to Lake Mary (Florida) | 4,186.39 mi (6,737.35 km) |
| Merthyr Tudful to Lake Monticello (Virginia) | 3,624.16 mi (5,832.53 km) |
| Merthyr Tudful to Lake Morton-Berrydale (Washington) | 4,693.68 mi (7,553.75 km) |
| Merthyr Tudful to Lake Norman of Catawba (North Carolina) | 3,840.65 mi (6,180.93 km) |
| Merthyr Tudful to Lake Oswego (Oregon) | 4,818.19 mi (7,754.13 km) |
| Merthyr Tudful to Lake Ridge (Virginia) | 3,547.71 mi (5,709.48 km) |
| Merthyr Tudful to Lake Ronkonkoma (New York) | 3,281.46 mi (5,281.00 km) |
| Merthyr Tudful to Lake Shore (Maryland) | 3,495.41 mi (5,625.31 km) |
