Turn right over the bridge in Sixt, following signs for the Cascade du Rouget and carry on up past the waterfall until the road ends at Le Lignon. Park here, or as close as you can get, as it gets very busy in Summer and at weekends. The entire walk is within the Sixt-Passy National Nature Reserve, which covers some 9,000 ha ranging in elevation from 900 m up to more than 3,000m. The diversity of the environment within the reserve means it supports a wide variety of fauna a