From Triangia to Rolla-Forcola you climb with medium-high physical effort on increasingly rough asphalt until it becomes very rough concrete alternating with fairly compact forest ground with grooved concrete on the hairpin bends and then becomes exclusively rougher forest (not recommended for gravel). bike, if not very daring) up to the panoramic point marked in komoot-map. From then on the journey up to Colina is much less demanding even if there are some sections with gradients of 6-8-10% on the ups and downs.
Just before the settlement of Colina, going down, you can deviate towards the suggestive lake which is located about 200 meters beyond the crossroads and possibly climb further up 4/500 meters of fairly uneven forest road on the open coast (up to an altitude of 2,200) or descend on a reasonably compact forest road up to the Galibio hut and then on more or less rough asphalt up to Postalesio.