The Reach and its underground area Arkthzand Cavern is a small DLC zone and therefore only contains two Lost Treasure map locations. Both are indicated on the map below:
Feel free to drop us a comment below in case you find any incorrect information or want to help others with more detailed instructions on finding these treasure maps!
See also: Deadlands skyshards map.
found at 15.77×72.38
in Arkthzand use the TM, should tell you if in the reach or in arkthzand
In the reach : across bridge to 37.86×65.64
To cave at 38.84×66.11
thru cave to 38.62×68.07
In arkthzan at 15.77×72.38