How to display OSM relations (in QGIS) from osm2pgsql filled PostGIS DB

I have a PostGIS DB filled with OSM data (osm2pgsql, standart.style). Now I would like to display a hiking trail (http://ift.tt/15qsdXf). It would also be fine, if I just could extract/export the relation as a multiline.

Is that possible?