The most people take the approach from Val Rio del Lago. You park on the parking place in the forest and then continue over the macadam road which is closed for public traffic. Soon you reach the meadow Malga Grantagar, 1530m.
From the meadow you follow the signposts for the marked route number 628. You ascend to the most northern part of the meadow where the marked route goes in to the forest. First you walk in forest but soon you come out of the forest and over the grassy slopes and through the dwarf pine you reach the marked route number 625 that goes on hut Rif. Corsi from the meadow Pecol below Montaz, 2754m.
First you follow the signposts of the route 625 in the west direction but soon you must turn to the north on the marked route with number 626. You reach the small basin and you cross it. Now you have only the last steep part to the notch Forcella Lavinal dell Orso / Skrbina sprednje Spranje, 2138m.
From the notch we follow the signpostst for the ferrata Anita Goitan in the east direction and over the steep grassy and rocky slopes we reach the south ridge of Cime Castrein / Kostrunove spice. It is very slippery in wetness.
From here ferrata continues to the east to the notch Forc. Mose, 2271m. But we start ascending over the south ridge in the north direction. We follow old military paths and somewhere it is a bit airy. We walk over some ledges, climb some short rocks and then we come to the steep airy steps. They are strewed with small rocks so be careful. Over the steps we reach the big bunker with long tunnel. Just above the bunker (on the right side) we climb to the summit of Kostrunove spice. Some parts are climbing around UIAA I.
We descend by the same route to ferrata Anita Goitan and then we decide where we will continue over trip.
This is also an easy ordinary ski tour to the notch. Forward to the summit from the notch it is an alpinistic ski tour. But be careful on avalanches.