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==Route description ==
[[Image: Perfil_estero_arrayan.png|thumb|250px|right|Profile estuary Array]]
[[Image: Valle_estero_arrayan_.jpg|thumb|250px|right|Myrtle creek the valley after an unusually low snowfallin snow. May 2004. Image: Marcos Allende]]
From the entrance of the Nature Sanctuary, continue driving along the road for 1.05 miles until you reach a fork. Turning to the right there is a car park. Cross the river and head up a path bearing left past the barbecues. Keeping the main river on your left the path rises and then falls to cross a stream. Following the path beyond this you will reach a small hut and swimming pool [http://www.termasdelacal.cl Cal Spas], which have tepid 20 º C water all year round which can rise to between 30 º C and 42 º C in the hot summer months. Depending on the season, it might be necessary to remove your shoes to cross the creek. From that point, the path is very clear to the end, always on the right side of the river. The trail weaves it's way through the valley with Nevado de Los Angeles (3623 m) acting as an impressive backdrop.
[[Image: Valle_estero_arrayan_2.jpg|thumb|250px|right| Myrtle creek valley. Note the pine Pine trees and the hills of Los Angeles to in the valley floordistance]] After about 15 minutes you must pass through a gate in the fence, and another gate half hour after crossing a small stream that carries water only in winter and early spring. Shortly after this you reach an area of large pine trees, where there is a stone corral. Past the area of pines, there are two large circular corrals on the valley floor and a third gate. Then the trail crosses a second stream, with more water than the first where it is a good place to stock up. [[Image: Cascada_valle_arrayan.jpg|thumb|left|250px |Little Falls Salto de soldado (Soldier Waterfall) just before the confluence]] Then there is then a long stretch before you reach Salto de Soldado, an attractive waterfall in the spring months. The bottom of the falls is just off the trail but there's a very faint path off to the right that reaches it. From this point it takes about 20 minutes to the confluence of two rivers that feed into the single river the trail has been following, this marks the end of the trek.
===Expected Time ===
*'''Trekking''': In a normal pace, this trek should take about 3 to 4 hours from the parking lot to the end point. The return is not much quicker as little height is gained.
