Les Gorges du Trient Opening hours De mai à octobre. Suggestions Dailley gorges The Dailley Gorges offer an extraordinary walk through wild yet easily accessible countryside. Van valley The Van valley is a gem of the Salvan-Les Marécottes region. Unspoilt nature, wildlife and alpine flora are what make it so charming! Trient bisse Located between the Forclaz Pass and the Trient Glacier, this bisse is easily accessible. Built in 1895, it offers a magnificent, safe and effortless walk in the shade of larch trees.