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{{Mountain Bike Chile}}
[[Image: Valle_estero_arrayan_2.jpg|thumb|350px|right| Pine trees and the hills of Los Angeles in the distance]]
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== Season ==
==Route description ==
[[Image: Perfil_estero_arrayan.png|thumb|250px|right|Profile estuary Array]] [[Image: Valle_estero_arrayan_.jpg|thumb|250px|right|the valley in 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.