Litlanesfoss (Icelandic pronunciation: ​[ˈlɪhtlaˌnɛsˌfɔsː]) is a waterfall in Hengifossá in Fljótsdalur, Eastern Iceland, also known as Stuðlabergsfoss [ˈstʏðlaˌpɛrksˌfɔsː, -ˌpɛr̥s-]. The waterfall is about 30 meters high and forms an apron in a cliff. The waterfall is in a large rock choir with an unusually regular supporting rock made of high and straight columns.