Cambios

| The trekking map "Condor Cicuit" issued by trekkingchile.com was very useful second source. This map indicates an alternative more direct trail from the basecamp Descabezado to the volcano and lake Hornitos but we opted for the slightly longer route around the Laguna Caracol because this route seams more attractive and more convinient for camping.

| rowspan="23" | GPT03

| Juan Pablo Ortega published on wikiexplora the rather hidden trail from from El Roble to the volcano Chillan along the rivers Ñuble, Estero El Quebrado and Las Minas. [http://www.wikiexplora.com/index.php/Traves%C3%ADa_Aguas_Calientes_-_R%C3%ADo_%C3%91uble This track] was very useful to find well-hikable connectionroute through the rather dense forest in this area.

| trekkingchile.com| The trekking map "Nevados de Chillán" issued by trekkingchile.com shows the trail from the hot spings at the volcano Chillan via Coihuería to the hot spings Los Peucos. Before findings this trail on this map I considered a challanging cross-country traverse to the river Polcura because I could not find any suitable trail on the Google Earth satellite images due to the dense forest.| -style="vertical-align: top;"| Google Earth | Google Earth was very helpful to plan the trail from the river Polcura to the northern end of the Laguna de Las Lajas and over the ridge to the hydro power station El Toro. On the satellite images the "bad weather escape route" well visible. This gave use a save and easy exit from the wether exposed ridge while a snow storm closed in.