| Untxillatx | |
|---|---|
 Mount Untxillatx | |
| Highest point | |
| Elevation | 934 m (3,064 ft) |
| Prominence | 375 m (1,230 ft) |
| Coordinates | 43°07′43.82″N 02°38′38.29″W / 43.1288389°N 2.6439694°W |
| Naming | |
| Language of name | Basque |
| Geography | |
  Untxillatx Location in Spain | |
| Location | Biscay, Spain |
| Parent range | Basque mountains |
| Climbing | |
| Easiest route | From Mañaria and the col of Oraieta. |
Untxillaitz, Untxillaitx, or Untzillatx, is a mountain of Biscay, Basque Country (Spain), 934 m. high. Its name may mean "Rabbit's peak" (in Basque language : untzi(a)=rabbit, and aitz=peak).
Part of the Urkiola range, although it does not belong to the same crest of the Anboto, it is also part of the same limestone range.
It forms the pass of Atxarte with the neighbouring Aitz Txiki and it is located in the valleys of Mendiola and Mañaria. Quarries have been created in both sides of the mountain, but now the Atxarte one is closed. Mañaria is the starting point of the Urkiola pass that separates Untxillatx from Mugarra.
An outstanding feature is the rock prominence in the north face, called Urresti. This prominence has many rock climbing ways and vulture nests.