"Grands Reportages" - September 2002 issue. Every September in Siberia, the Arctic Toundra offers to travellers the multicolored show of a boreal autumn. But here, in Kamtchatka (Far East Russia), the permanent volcanic activity of the Peninsula adds on top of this vegetal mosaic, a supplement of unexpected colors. The only means of transportation available there are 6x6 trucks or helicopters. The article unveils such different regions as Central Kamtchatka, Uzon Caldeira, Tolbachik and Karimsky volcanoes areas.