There are lots of snowshoe trails in Les Mosses; we chose the one of Pra Cornet, a very challenging loop of 9km with 4 hours hiking. But the spectacular panorama from the plateau at the top of the hill is worth the effort. There is a little mountain restaurant where you can get a fondue while admiring the breathtaking views.
https://goo.gl/maps/LwocWqzFxarAEBhw9
https://www.schweizmobil.ch/en/snowshoe-trekking/trails-e/route-0463.html
https://www.aigle-leysin-lesmosses.ch/en/P16164/pra-cornet-refuge