Cambios

The path ascends through A few steps to the forest on a very clear track. After some 30-40 minutes left of walking, the vegetation disappears and entrance to the first fumaroles become visible. The route goes some 100 meters from themTermas de Chillan resort hot springs, so at the detour is well worth it. Then you should keep going to last curve before the pass parking lot, a path begins that leads to the mud bathsascends a forest of Coigües. Here, [[Imagen:Vista_valle_Aguas_Calientes_desde_el_Oeste.jpg|thumb|200px|Aguas Calientes Valley as seen from At the Pass. Photo: Juan Pablo Ortega]] start you will see the pass for the first time, towards the east, located next to the left of a tower of rockswooden that says "Cabalgatas a Fumarolas - T. At this Aguas Calientes - Cel. xxxxxxxx". This point, you will have two options: descend to the mud baths and then ascend through the valley, or mount a few is at 1.710 meters on the edge with direction to some second fumarolesof elevation.

If you decide for The path ascends through the fumaroles, once these cross, you will see forest on a fork, which is not too visiblevery clear track. A path descends until reaching After some 30-40 minutes of walking, the valley vegetation disappears and another follows the hillside without losing heightfirst geysers become visible. The route goes some 100 meters from them, following so a black tubbing that carries water to Termas de Chillándetour is well worth it. Although Then you should continue to the path pass that descends leads down to the valley will make mud baths. Here, [[Imagen:Vista_valle_Aguas_Calientes_desde_el_Oeste.jpg|thumb|200px|Aguas Calientes Valley as seen from the Pass. Photo: Juan Pablo Ortega]] you lose height and goes back to will see the vegetationsecond pass for the first time, it is a more comfortable trek than towards the traverse east, located next to the tubbing (the waypoint "Estero"left of a tower of rocks. At this point, though, corresponds you will have two options: descend to the traverse route)mud baths and then ascend through the valley, or ascend a few meters on the ridge towards some second geysers.

After about 30 minutes of walking through If you take the forest geyser route, once these cross, you will see a fork, which isn't too visible. A path descends towards the trees begin to lose height until valley and another follows the vegetation disappears again at 2080 metershillside without losing elevation, following a black tubing that carries water to Termas de Chillán. The track Although the path that descends to the pass is very clearvalley will make you lose elevation and goes back through vegetation, at 2400 meters it is a more comfortable trek than the traverse next to the tubing (2 the waypoint "Estero", though, corresponds to 3 hours by carthe traverse route). [[Imagen:Valle_Aguas_Calientes_desde_el_este.jpg|thumb|left|200px|Aguas Calientes Valley as seen from The main valley path is also very well marked with white round circles on rocks along the East (fin del trek)way. Photo: Juan Pablo Ortega]]

Along this main route, after about 30 minutes of walking through the forest the trees begin shrink until the vegetation disappears again at 2080 meters. The track to the pass is very clear, along volcanic rock and scree, ascending to a maximum of 2400 meters (2 to 3 hours from the parking lot). [[Imagen:Valle_Aguas_Calientes_desde_el_este.jpg|thumb|left|200px|Aguas Calientes Valley as seen from the East (fin del trek). Photo: Juan Pablo Ortega]]  You may find isolated spots of snow until the middle of the summer. From the pass, on a sunny day you may appreciate can see the [[Circuito Volcán Antuco|volcán Antuco y and la Sierra Velluda]] to the south. También aparece hacia el este el precioso valle The Valle de Aguas Calientesalso can now be seen. El bajarAs you descend there are two cross-paths which are blocked off by rocks, muy pronto aparecerá una ancha huella construida por un bulldozer proveniente de las canchas de skistay on the main trail. Sin embargo, el sendero se desprende muy pronto de ella, y baja con mucho mayor pendiente en dirección al este. Se deben descender algo más de Continue to descend some 300 metros desde el paso hasta llegar al valle, donde se es recibido por el cruce de un estero de agua helada con otro caliente meters into the valley. When you reach the bottom you will have to cross the first small thermal and cold water streams. Only 400 meters later (primer rio termalEast)you will see the second thermal river. Sólo 400 metros más en dirección al este, aparece la segunda fuente termalThere are nice campsites here and the hike can be ended at this point. En el mismo lechoThis campsite is more scenic than the second described, coexiste un hilo de agua caliente con un torrentoso estero de agua tibia. Este lugar puede ser considerado como término anticipado del trekking si no se desea caminar más. Es altamente recomendable apartarse del sendero y remontar el rio aguas arribawith views of the volcano, donde se encontrará el origen del agua termal en forma de cascadashowever the hot springs are quite hot. Si se opta por esta alternativa conviene cruzar el estero torrentoso -lo cual puede requerir sacarse los zapatos- y subir la ladera que limita el rio, luego de caminar por aproximadamente 10 minutos, al ver pastizales entre el filo de la ladera y el rio, se debe descender por esta escarpada pendiente hasta llegar al rio mismo y "voi la" las cascadas termales. Para seguir There is also a las otras fuentes termales hay que devolverse hasta hasta el punto en que se abandonó el sendero y seguirlo por el verde valle hacia el este. 1,7 kilómetros más adelante, aparece un tercer estero termal, de agua tan caliente que, en su origen, incluso permite cocinar side hike upstream along the ridge once you cross the second thermal river which takes you to waterfalls (con pacienciathey can be dry off season). Es además potable, por lo que permite tomar café y té directamenteThere is also a small waterfall slightly downstream at this site. Continuing on the main trail from this site, sin necesidad de utilizar cocinilla1.7KM later you will cross the third thermal stream. The water here at the source is quite hot and can be used to make coffee or tea. [[Imagen:Segundo_Rio_Termal_zona_cascadas.jpg|thumb|150px|left|Segundo rio termal. Imagen: Juan Pablo Ortega]]Sólo  Continuing along the main trail some 630 metros más hacie el estemeters, el valle termina, y se encuentra un espléndido pozón, alimentado por un generoso chorro caliente, un pequeño estero helado y un afloramiento de agua tibia (todo en uno), lo que permite calibrar la temperatura "a gusto"the valley ends. Junto There are campsites and a él existen buenos lugares para acamparlarger thermal pool that is fed by a small waterfall. Este punto da fin al There are colder streams that feed into this pool too so you can sit where the temperature is most comfortable. This point is the end of the trek aún cuando el sendero continua hasta el , however you can continue on the trail to Rio Ñuble. Éste esta descrito en el This is described in the trek

Considerar 4 a -5 horas desde el autohours from the parking lot