From Senet, a short paved climb takes us to the Baserca reservoir dam, also known as the Senet reservoir, located at an altitude of 1,361 metres. Built on the Noguera Ribagorçana river, this hydroelectric reservoir is surrounded by peaks over 3,000 metres high, such as the Maladeta massif, the Besiberri massif and the Pic de Mulleres. The landscape is granitic, rugged and spectacular: a deep valley carved out between mountains that accumulate snow for much of the year. Once you have passed the dam along a very rough and steep section of track, the track widens and the slope eases as you follow the GR11, with open sections that allow you to contemplate the blue water of the reservoir on the left and the alpine forests of black pine and fir that mark the way north.