This Datacron is in a cave on a mountainside that you can see from the trail to the Forward Camp. East from the Forward camp is the entrance to the cave located in Flesh Raider Territory at x:-28,y: ...

Enter the cave in picture / map (coordinates -26, -30)... ...and follow the passage to reach the datacron.

First, to go to the northwest edge of Anchorhead and look for a sand dune that is almost at the top of the wall. Follow the wall all the way across, which will lead ...