Spring canyon, completely dry in summer, overall easy and open, discontinuous. Only one "technical" waterfall ( only with high water flow) in a narrow fissure.

Spring canyon, completely dry in summer, overall easy and open, discontinuous. Only one "technical" waterfall ( only with high water flow) in a narrow fissure.

From Varallo, drive to the hamlet of Crevola and leave the first car in the sports center parking lot (tennis and volleyball courts). With the second car, continue and take the road toward Parone; before reaching the village, turn right towards Alpe Casavei and leave the car at the end of the road.

From Alpe Casavei, take CAI trail 603 towards Alpe Barca, following a flat or slightly descending path. From there, connect to trail 601 on the left, which climbs into the Paccalotto valley; after about 10 minutes, the trail crosses the stream, marking the start of the canyon.

The route begins with some walking along the streambed until you reach the first drop—a 20m rappel on the left (anchored to a tree; actually down-climbable when water flow is low). Next comes another 25m rappel on the left down a sloping face (tree anchor), followed by a third, more vertical drop (20m, left, tree anchor). Continuing on, there is a 15m rappel on the right (tree anchor), followed by a sequence of a 18m rappel on the left (tree anchor) and a 28m rappel on the left; the latter is the canyon's only "technical" waterfall, with the first section involving a descent through a narrow fissure that is tricky when water flow is high. The canyon floor levels out and there is a stretch of walking; it is best to leave the boulder-strewn streambed and follow easier animal tracks. You encounter a small waterfall—a potential 10m rappel on the right (tree anchor)—followed by more walking. You reach a sloping 20m waterfall on the right (tree anchor), then a 12m drop on the left that passes over a small, disused dam. Next comes a 25m rappel on the right (tree anchor, very sloping), followed by a 15m rappel on the left (tree anchor) and a 13m rappel on the right that leads into a large fissure. Continuing a short distance along the riverbed, you arrive at a bridge; the anchor for the final 40m rappel (on the right, with a deviation) is attached to it.

After the last waterfall, continue along the stream for another 5 minutes until you are almost at the Sesia River; on the right, a path running alongside the river—which here seems to form a small lake—leads back to the sports field and your car in 15 minutes.