Go to the village of Arith then to the Montagny car park at the top of the village (altitude 880m).
(S) Take the track, ignoring the paths that branch off on either side, including those signposted for Creux de Lachat. After a hairpin bend at a place called La Benoite
(1), take the path that branches off to the right. You will come to a crossroads marked with a wooden cross.
(2) Take the path on the left. 750m further on, you will arrive at Mariet-dessus.
(3). Take the path on the left again. After passing a few chalets, you will arrive at the edge of the forest.
(4). Turn left and follow the signs for Creux de Lachat. The path climbs through the forest to an intersection, which indicates that the Creux de Lachat refuge is 20 minutes away and the Montagny car park is 1 hour and 10 minutes away.
(5) Head towards the refuge, west then north.
(6) Return to the intersection mentioned above and this time head towards the Montagny car park. Now just follow the signs. You will come out onto a wide track.
(7) You can either continue along it, descending gently, or cross the track and take a path through the forest. The two paths meet again near the finish (E).
A beautiful hike, although it's a shame that the route is mostly in the forest. You make up for it at the summit with views of Mont Blanc, beautiful sunshine and warm weather. The snow is good in the morning, but in the evening it sticks to your snowshoes on the descent. Worth doing again in the summer. Thank you for the Viso trail.