 The last lava flows were erupted from The Volcano about 150 years ago.Iskut Canyon Cone produced at least 10 thick lava flows which initially dammed the Iskut River.The name of these in the Tlingit language is Seikhulé, referring to the mountains not being flooded during Aangalakhú (the Great Flood) and they were one of the high peaks used as a refuge during that time.