Parked right below Verigo, where the paved road ends near a small church and a large parking area. Approach following the old road, accessible on foot and by mtb, first crossing the cement bridge on Margologio where it is possible to look at the flow (reference pictures attached as normal/medium flow), then continuing up on the road until finding a path on the right side which will bring you till the railway crossing. Once crossed the railway, take the left in the opposite direction of the stone bridge on Margologio, and after a sharp bend of the railway you'll find on the right the path going upward, at the beginning not fully evident but than turning into a mule track leading up to Alpe L'Erta. From the Alpe climb up towards the last stone houses till a signpost, take the left path and follow it until you cross Margologio at height 1080 (1048 start indicated on Canyons du Haut Piémont Italien-Torrentismo in Alto Piemonte) Quite everywhere old french 8mm chains, many times doubled, but in many points only one out of the two usable, in some other points in very bad conditions or unusable. Quite open at the beginning and turning from mid to end in more narrow section and passages that should not be underestimated in case of higher flow considering current belays.