I would strongly suggest to stick to an approach for hiking routes that is similar to the one commonly applied to cycle routes: "Cycle routes or bicycle route are named or numbered or otherwise signed routes." ("cycle routes" wiki page) In addition a cycle route that has been proposed and is likely to be implemented within he next few years can be inserted in OSM as a cycle route relation with the additional tag state=proposed. Routes that are not trail-blazed in some way and are not proposed by some kind of official body should not be mapped as cycle route relations.
Volker Italy
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