The listing of the first cache GC6N100 ("Start") will give you detailed information on the hike. There you will find a map, waypoints and much more!
This is cache number three of the series. Welcome to the highest point of this hike: Pass "Kex". Enjoy the view, before you descend to Kirkjusandur. The cache can be reached from the plateau - no need to climb etc.
WARNING: The Descend from Kex to Kirkjusandur may be dangerous (very steep scree - Beware of falling stones) and care should be taken