Euskal Mendiak
| Nombre | Altitud | Zone | Ph. | |
|---|---|---|---|---|
 | Udi | 1081 | 15 | |
| Udiartea | 1007 | 6 | |
| Ugagibel | 1229 | 24 | |
| Ugarra | 854 | 27 | |
| Ugarron | 730 | 7 | |
| Ugarte | 629 | 5 | |
| Ukerdi | 2251 | 48 | |
| Ukua | 1061 | Labia | 13 |
| Ulizar | 867 | 37 | |
| Umandia | 1224 | 50 | |
| Umión | 1434 | 26 | |
| Unanua | 651 | 10 | |
| Unbe | 302 | 8 | |
| Unboto | 796 | 24 | |
| Unesa | 993 | 4 | |
| Ungino | 1105 | Garobel / Sálvada | 58 |
| Untzillatx | 934 | Durangaldea | 36 |
| Untzueko haitza | 990 | Alaitz | 22 |
| Untzueta | 766 | Mendigisa | 18 |
| Unzanos | 734 | 5 | |
| Upo | 567 | 28 | |
| Upo | 608 | Gorbeia | 7 |
| Urakorri | 1306 | Aralar | 40 |
| Urdaburu | 598 | 106 | |
| Urdanatz / Erbilarreta | 1118 | 27 | |
| Urdanegi | 1132 | 8 | |
| Urdani | 855 | 7 | |
| Urdantxi | 749 | 4 | |
| Urdazkain | 899 | 7 | |
| Urdelar | 852 | 42 |
