Zadnja Trenta valley is situated in the heart of East Julian Alps. It is a typical alpine valley with elevations of about 800 m at the bottom, surrounded by mountain ridges from 2.000 m to 2.300 m high. The highest peak is Mt. Jalovec (2.645 m) at the northwest of the valley. It is the 6.th highest peak in the Julian Alps and in the country. Soča River springs in the valley. The valley has a unique position because it is closed almost on all sides. There are no submediterranean influences in it as it is the case with the middle and the lower Trenta valley. The region is still pristine, not inhabited, with a single narrow dirt road in its lower part. The mountain peaks on the south east side as well on its northwest side are today almost untouched by man, although the upland grassland was used for goat and sheep grassing centuries ago. There are no public trails across these peaks. The region has very large biodiversity and belongs 100% to Triglav National Park.