Pen yr Allt Uchaf
| Articul per Ladin Gherdëina | 
|
| Pen yr Allt Uchaf | |
|---|---|
 | |
| Piza | |
| Autëza | 620 m |
| Prominënza | 59,9 m |
| Geografia | |
| Stat | Riam Unì |
| Raion | Gwynedd |
| Coordinedes | 52°45'45.90"N, 3°40'28.74"W[1] |
  Pen yr Allt Uchaf Pen yr Allt Uchaf (Riam Unì) | |
L Pen yr Allt Uchaf ie n crëp tl Riam Unì. L toca pra la ciadëina de crëps Eryri y à na autëza de 620 metri.