In addition to the already existing website of the Tourism Information Office about Maramures, now there is a new not for profit website made by WWF and EcoRomania about the Mara and Cosau Valleys (including Creasta Cocosului). Since last summer, this area is now an official ecotourism destination (the only one in Romania together with the Zarnesti region).
The website is just recently launched and constantly updated. For now, it is available in Romanian and English. Here is a link to the English version: http://ecomaramures.com/en/